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WEMS 2019

15–17 Jul 2019
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Contribution List

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  1. 1. Welcome
    Haraldur Pall Gunnlaugsson (University of Iceland (IS)), Iraultza Unzueta Solozabal (Universidad del País Vasco / Euskal Herriko Unibertsitatea (ES))
    15/07/2019, 09:00
  2. 22. Welcome and Physics in Bilbao
    Prof. Fernando Plazaola Muguruza (University of the Basque Country (UPV/EHU))
    15/07/2019, 09:05

    The talk is intended to welcome all the participants to Bilbao and to the University of the Basque Country (UPV/EHU). Further, the main investigation lines of the group lead by F. Plazaola will be presented, along with the latest results obtained in Hyperthermia, Shape Memory Alloys, Mössbauer spectroscopy and Positron Annihilation Lifetime Spectroscopy.

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  3. 49. ISOLDE: Facility and Status
    Karl Johnston (CERN)
    15/07/2019, 09:35

    Solid state Physics research at ISOLDE (CERN) has been running since the mid-1970s and accounts for about 10-15% of the overall physics programme. ISOLDE is the world flagship for the on-line production of exotic radioactive isotopes, with high yields, high elemental selectivity and isotopic purity. Consequently, it hosts a wide variety of state-of-the-art nuclear techniques which apply...

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  4. 50. Solid State Physics at ISOLDE
    Karl Johnston (CERN)
    15/07/2019, 09:50

    The idea that “new-is-small” reflects a paradigm moving industries and research. New materials, new applications, new technologies, - but what do we need to make the “new”, understandable, applicable and reliable? Clearly, as things go smaller and smaller, it is more difficult to probe at the appropriate scale without influencing the subject of interest. Ideally, one needs tip-less...

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  5. 37. eMS at ISOLDE
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    15/07/2019, 10:05

    I will give a quick overveiw of the facilities available

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  6. 18. Beam time 2018: Overview
    Hilary Masenda (University of the Witwatersrand)
    15/07/2019, 10:20

    An overview of the beam-time will be given focusing on the status of measurements, equipment and challenges.

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  7. 12. AlGaN and InGaN: Overview of Proposals
    Dr Hilary Masenda (University of the Witwatersrand)
    15/07/2019, 10:45

    An overview of results from the binary system will be given and the differences observed in their corresponding spectra that paved a way for studying the ternary system will be highlighted.

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  8. 16. Nitrides as radiation detectors
    Rajdeep Adhikari
    15/07/2019, 11:00
  9. 14. Charge states of Fe in AlGaN and AlGaN:Mn
    Hilary Masenda (University of the Witwatersrand)
    15/07/2019, 11:15

    The spectra for Fe implanted AlGaN show the presence of magnetically-split sextets in the “wings”, similar to features observed in GaN and AlN, attributed to Fe3+ on Al/Ga sites showing slow paramagnetic relaxations. The central part of the spectra is characterised by paramagnetic Fe2+ on Al/Ga sites associated with nitrogen vacancies. However, with Mn doping, the contribution of Fe3+ is...

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  10. 17. III-Nitride alloys: a recent update - growth and structural characterization
    Rajdeep Adhikari
    15/07/2019, 11:30
  11. 13. InGaN - Preliminary analysis + Remaining Shifts
    Hilary Masenda (University of the Witwatersrand)
    15/07/2019, 12:00
  12. 42. Charge imbalance by charged particle irradiations: Experiences from Optically Stimulated Luminescence and Implications for Mössbauer spectroscopy
    Martin Autzen
    15/07/2019, 13:50

    Irradiating with charged particles can result in the build-up of a net charge in the irradiated material if the range of the particles is shorter than the shortest dimension of the material. This results in a net stored charge in the material, and may ultimately lead to charge break-down. The phenomenon is often observed in insulators or wide-band gap semi-conductor materials (e.g. Blaise and...

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  13. 6. Isomer shifts in binary covalent systems (invited)
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    15/07/2019, 14:20

    I will talk about the semi-emperical model ...

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  14. 3. 57Fe Mössbauer study on the lattice defects in the TiN thin film & 57Fe Mössbauer study on the lattice defects in VN thin film for catalyst applications
    Bingcui Qi (University of Iceland (IS))
    15/07/2019, 14:50

    TiN thin films are interesting gate materials in future non-Si based metal-oxide semiconductor devices. TiN has also been experimentally confirmed with strong surface plasmon resonance at the near infrared spectral range. In water splitting experiments, TiN nanoparticles were found to outperform Au nanoparticles in the enhancing photocurrent under solar irradiation. However, the performance...

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  15. 43. Results from chemistry experiments in 2017
    Sergey K Dedushenko (Moscow Institute of Physics and Technology State University (RU)
    15/07/2019, 15:00

    Chemical experiments with Mn-57 at ISOLDE CERN
    Dedushenko S., Gunnlaugsson H., Larsen E., Olafsson S., Johnston K., Masenda H., Peters G., Schell J., Unzueta Solozabal I., Yablokov M., Zyabkin D., Bendix J., Bharuth-Ram K., Gisslasson H., Hemmingsen L., Krastev P., Langouche G., Mantovan R., Naidoo D., Perfiliev Yu., Qi B., ISOLDE Collaboration

    ISOLDE, CERN

    EMS is an important method...

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  16. 19. Resaults obtained in NaCl
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    15/07/2019, 15:20

    I will talk about the results obtained in NaCl in Mn18. A single line is observed that can be interpreted as due to singly charged Fe in S=1/2 spin state

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  17. 21. Fe at the interface with 2D-transition metal dichalcogenides and topological insulators (invited)
    Dr Roberto Mantovan (CNR-IMM Agrate Unit (IT))
    15/07/2019, 15:55

    The integration of ferromagnetic thin films (FM) with the classes of two dimensional (2D) transition metal dichalcogenides (TMD) and topological insulators (TI) constitutes a very promising route to build-up the next generation of spintronic devices [1]. In particular, the use of TMD and TI can boost the efficiency of the spin orbit torque exerted to an adjacent FM layer, by taking advantage...

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  18. 38. Oveview of the IS501 experiment
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    15/07/2019, 16:25
  19. 52. IS611 overview: Study of molybdenum oxide by means of Perturbed Angular Correlations and Mössbauer spectroscopy
    Juliana Schell (Institut Fur Materialwissenschaft Universität Duisburg-Essen (D)
    15/07/2019, 16:35

    Among transition-metal oxides, the Molybdenum oxide compounds are particularly attractive due to the structural (2D) anisotropy and to the ability of the molybdenum ion to change its oxidation state, being such properties well adequate for applications on, e.g., chemical sensors, solar cells, catalytic and optoelectronic devices. At ISOLDE we aim studying the incorporation of selected dopants...

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  20. 53. Flakes of MoOx
    Juliana Schell (Institut Fur Materialwissenschaft Universität Duisburg-Essen (D)
    15/07/2019, 16:45

    We report the angular dependence of the 2-dimensional α-MoO3 single crystals by emission Mössbauer Spectroscopy (eMS) via ion implantation via of 57Mn (t1/2 = 1.5 min) carried out at ISOLDE-CERN. In addition, scanning electron microscope analysis was carried out at room temperature.

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  21. 15. Charge state engineering and tuning of transparent conducting properties in MoOx
    Rajdeep Adhikari
    15/07/2019, 16:55
  22. 45. Hydrogenated anatase annealing with eMS
    Dmitry Zyabkin (Technische Universitaet Ilmenau (DE))
    15/07/2019, 17:15

    Results obtained during the eMS beam time in 2017 on hydrogenated anatse titania. Spectra have shown an interesting behaviour, which turned out to be different in comparision to pristine samples.

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  23. 41. Subatomic nuclear activity in the Hydrogen based Rydberg matter state
    Sveinn Olafsson (University of Iceland (IS))
    16/07/2019, 09:00
  24. 7. Overview paper on silicon - status
    Deena Naidoo (University of the Witwatersrand)
    16/07/2019, 09:30
  25. 9. In in group IV semiconductors
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 09:35
  26. 8. Paper on vacancy diffusion in SiGe
    Deena Naidoo (University of the Witwatersrand)
    16/07/2019, 09:40
  27. 10. Modelling of cage motion in silicon
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 09:50
  28. 11. Future of Iron in silicon - discussion
    Deena Naidoo (University of the Witwatersrand)
    16/07/2019, 10:05
  29. 29. Overview of Mn-based Alloys: Measurement Status
    Iraultza Unzueta Solozabal (Universidad del País Vasco / Euskal Herriko Unibertsitatea (ES)), Roberto Mantovan (CNR-IMM Agrate Unit (IT))
    16/07/2019, 10:55

    Mn-based Alloys are characterized by a wealth of properties, which are of interest both from fundamental physics point of view and particularly attractive for different applications in modern technology. In order to uncover new routes towards the optimization of the properties of these materials, it is crucial to establish a direct correlation between macro- and micro-scaled...

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  30. 30. MnSi Alloys: SQUID results
    Andrei Zenkevich (MIPT)
    16/07/2019, 11:10

    The talk will be focused on the results of Si-implanted MnSi alloys and particularly on SQUID results.

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  31. 31. epsilon-FeSi thin film and single crystal: a comparison between eMS and CEMS
    Roberto Mantovan (CNR-IMM Agrate Unit (IT))
    16/07/2019, 11:25

    A comparison between eMS and CEMS will be presented in e-FeSi thin film and single crystals.

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  32. 23. Status and Results of MnxGa Alloys
    Iraultza Unzueta Solozabal (Universidad del País Vasco / Euskal Herriko Unibertsitatea (ES))
    16/07/2019, 11:40

    An overview of the eMS measurements (119In / Sn and 57Mn / Fe) carried out in MnxGa (x = 0.7, 0.8, 1.1, 1.4, 1.9) alloys (2014-2018) is presented. The most relevant results obtained from the data fitting will be highlighted. In the final part of the talk, a time for a quick discussion on the interpretation of the results will be given.

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  33. 32. Remaining Shifts in Mn-Based Alloys
    Iraultza Unzueta Solozabal (Universidad del País Vasco / Euskal Herriko Unibertsitatea (ES)), Roberto Mantovan (CNR-IMM Agrate Unit (IT))
    16/07/2019, 11:55

    There are remaining shifts, particularly 119In shifts, which will help on the interpretation of the local magnetism in MnxGa alloys.

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  34. 36. eMS and CEMS on (virtually) room-T ferromagnetic FeGe single crystal
    Roberto Mantovan (CNR-IMM Agrate Unit (IT))
    16/07/2019, 12:10

    The eMS and CEMS on (virtually) room-T ferromagnetic FeGe single crystal will be exposed and discussed in this talk.

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  35. 48. 57Fe-eMS Results on Nanocrystalline Fe76Mo8Cu1B15
    Iraultza Unzueta Solozabal (Universidad del País Vasco / Euskal Herriko Unibertsitatea (ES))
    16/07/2019, 12:15

    57Fe emission Mössbauer measurements, carried out on virgin and annealed Fe76Mo8Cu1B15 nano-crystalline samples are presented in this talk. The discussion is focused on the role of the implantation-induced damage, and its effect on the atomic-scale magnetism.

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  36. 2. Results obtained in LiF
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 13:50

    I will give an overview of the results obtained in LiF from 2018. Fe is observed at Fe1+ S=1/2 as in NaCl and additionally as Fe2+, presumably in low spin configuration

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  37. 59. eMS Results on BN
    Deena Naidoo (University of the Witwatersrand)
    16/07/2019, 14:05
  38. 20. Results obtained in MF2 (M = Mg, Ca, Ba)
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 14:20

    I will describe the results obtained in di-fluorides from Mn18

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  39. 33. Overview and Preliminary results from InGaAs
    Krish Bharuth-Ram
    16/07/2019, 14:35
  40. 26. Annealing studies with emission Mössbauer spectroscopy using short lived parent isotopes: Properties of implantation damage in ZnO
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 14:45

    I will briefly describe the status on "quenching". A manusrcript is ready but needs feedback

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  41. 60. eMS - Ge2Sb2Te5 Results
    Deena Naidoo (University of the Witwatersrand)
    16/07/2019, 15:00
  42. 58. FeV status
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 15:10
  43. 4. Local metal-insulator transitions in V2O3 thin films studied by 57Fe emission Mössbauer spectroscopy
    Bingcui Qi (University of Iceland (IS))
    16/07/2019, 15:35

    Metal to Insulator-to-transitions (MIT) driven by electronic interactions in strongly correlated materials are among the most remarkable phenomena in condensed matter physics. It has been found important applications in the next-generation so-called “beyond silicon” electronics and neuromorphic devices. Vanadium sesquioxide V2O3 is a prototypical Mott insulator, which undergoes the MIT between...

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  44. 39. Resaults obtained in fluoride doped SnO2
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 15:45
  45. 5. Local metal-insulator transitions in VO2 thin films studied by 57Fe emission Mössbauer spectroscopy
    Bingcui Qi (University of Iceland (IS))
    16/07/2019, 15:55

    VO2 shares the similar metal-insulator transitions (MIT) and structural phase transition properties as the V2O3 and found equally important applications in Mott memory and neuromorphic devices, which surpass the limitations of conventional electronics. In contrast, MIT occurs at much higher temperature (340 K) in VO2 that that (160 K) in V2O3. Furthermore, the MIT of VO2 is much more robust...

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  46. 40. Measurements of 57Mn implanted LiNbO3 and LaTaO3
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 16:05
  47. 51. Bismuth Ferrite BFO
    Juliana Schell (Institut Fur Materialwissenschaft Universität Duisburg-Essen (D)
    16/07/2019, 16:15

    Bismuth Ferrite is the best studied room temperature multiferroic due to its potential applications as magnetoelectric memory and in magnetic sensing. Its magnetic order is a result of spin moment coupling of the iron ions. A modified G-type antiferromagnetism yields an effectively vanishing gross magnetization. Magnetic order in Bismuth Ferrite becomes intricate due to the formation of the...

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  48. 56. STO paper
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    16/07/2019, 16:30

    I will briefly tell about the status of a STO paper

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  49. 57. Garnet structures studies following eMS. Results and perspectives.
    Petko Krastev (University of Sofia (BG))
    16/07/2019, 16:40

    Synthetic crystalline garnets doped with the rare-earth elements are commonly used as a host materials in acoustic transmitters and numerous nonlinear optics applications because of their ability to generate ultra short pulses. 57Fe emission Mössbauer spectroscopy (eMS) following implantation of 57Mn (T½ = 1.5 min.) in the temperature range from 298 K to 798 K has been applied to study the...

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  50. 35. Ar and C doped ZnO
    Krish Bharuth-Ram
    16/07/2019, 16:55
  51. 25. SPES: An intense source of radioactive beams at Legnaro
    Alberto Andrighetto (INFN Laboratori di Legnaro)
    17/07/2019, 09:00

    The SPES project at the Laboratori di Legnaro of INFN (Italy), currently in the construction phase, consists of a new cyclotron accelerator delivering high intensity, up to 70 MeV proton beams. The beam impinges on an ISOL target for the production of a variety of radioactive nuclei for nuclear physics experiment.

    Its target-ion source complex represents the core of an ISOL facility. In...

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  52. 46. eMIL: advanced emission Moessbauer spectrometer
    Dmitry Zyabkin (Technische Universitaet Ilmenau (DE))
    17/07/2019, 09:30

    A look at the new setup for eMS experiments.

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  53. 47. eMIL: Discussions upon Equipment
    Dmitry Zyabkin (Technische Universitaet Ilmenau (DE))
    17/07/2019, 09:45

    Talks over new ways how to perform advanced experiments by virtue of eMIL such as: advanced magnetic, cryogenic measuraments as well as measurament od electroconductivity and experiments performed under pressure in-situ.

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  54. 44. Future chemistry experiments
    Sergey K Dedushenko (Moscow Institute of Physics and Technology State University (RU)
    17/07/2019, 10:05

    On the progress in automation of the chemical experiments with Mn-57
    at ISOLDE CERN

    Yu.K.Belov, S.K.Dedushenko, D.M.Levin, M.G.Tsepkov
    Moscow, Russia
    Mössbauer Collaboration Team
    ISOLDE, CERN

    First wet-chemical experiments with Mn-57 were conducted at ISOLDE in June 2017. They comprised multiple steps: placement of a piece of metallic foil (target) in the implantation chamber...

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  55. 28. High energy shifts
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    17/07/2019, 10:25

    We have few high energy shifts (I161), what to do with them?

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  56. 27. Proposal on Halides and Fluorides
    Haraldur Pall Gunnlaugsson (University of Iceland (IS))
    17/07/2019, 10:45

    I will talk about possibiliites of making a proposal on Halides and Fluorides

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  57. 54. Future Project BiFe
    Juliana Schell (Institut Fur Materialwissenschaft Universität Duisburg-Essen (D)
    17/07/2019, 11:00

    Magnetoelectric coupling exists locally but is not observable macroscopically due to the antiferromagnetic order. We aim to submit a project to the INTC-CERN in order to use emission Mössbauer spectroscopy to study magnetoelectric coupling and the effect of implantation process in bismuth ferrite.

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  58. 55. Magnetism (Mn3Ge, MnBi, MnAl )
    Dmitry Zyabkin (Technische Universitaet Ilmenau (DE))
    17/07/2019, 11:15

    Possible studies related to new candidates considered to be alternatives to rare-earth-based hard magnetic materials. Several possible directions are going to be presented, studies can be done on basis of thin films.

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  59. 62. Open discussion - future of eMS
    17/07/2019, 11:30
  60. 61. Concluding remarks
    17/07/2019, 12:00

    Plus conference photo

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  61. 63. Internal meeting of the Mössbauer collaboration at ISOLDE/CERN
    17/07/2019, 13:50

    Things that need to be addressed:
    - Publication rules
    - Group structure
    - Committees
    - FTP/WEB etc

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  62. 64. Internal meeting of the Mössbauer collaboration at ISOLDE/CERN
    17/07/2019, 15:40

    Things that need to be addressed:
    - Publication rules
    - Group structure
    - Committees
    - FTP/WEB etc

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  63. 24. eMS Results in Heusler and Pd2MnSb Alloys
    Iraultza Unzueta Solozabal (Universidad del País Vasco / Euskal Herriko Unibertsitatea (ES))

    One of the main conclusions obtained by ion-implanting and subsequent eMS measurements in Ni-based Heusler alloys performed at ISOLDE, is that the implantation damage destroys the local magnetism. eMS measurements are compared with transmission 119Sn Mössbauer measurements, where a clear influence of the implantation damage is observed.

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