Speaker
Roxana Capu
(West University of Timisoara, Romania)
Description
Using low energy Muons spin rotation spectroscopy, measurement of dc/ac magnetic susceptibility and measurement of capacitance, we show that epitaxially grown Nd-based perovskite high entropy oxides exhibit significant ferromagnetism, spin-glass behaviour, high dielectric constant at RT and a temperature-dependent ferroelectric hysteresis that are intricately coupled to each other. X-ray absorption spectroscopy at 3d transition metal edges indicates a mixed valence state - possibly originating from the off-centring of the B-sites- that helps to explain these properties. These materials could be useful for exploiting magnetostriction and other related properties leading to next-generation sensors.
Authors
Roxana Capu
(West University of Timisoara, Romania)
Subhrangsu Sarkar
Co-authors
Ryan Thompson
(University of Fribourg)
Dr
C. Willem Rischau
(University of Geneva, Switzerland)
Dr
Marli R. Cantarino
(ESRF, Grenoble, France)
Dr
Stefan Schuppler
(Institute for Quantum Materials and Technologies(IQMT), Karlsruhe Institute of Technology(KIT), Germany)
Dr
Sergey Budko
(Ames Laboratory, U.S.A)
Stefano Gariglio
(Université de Genève)
Zaher Salman
Prof.
Yurii Pashkevich
(University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Fribourg CH-1700,Switzerland; O. Galkin Donetsk Institute for Physics and Engineering NAS of Ukraine, Ukraine)
Christian Bernhard
(Fribourg University)
