Conveners
M2PoC - Focused Session: Latest Development in Flux Pinning I: Flux Pinning, Critical Currents
- Judy Wu (University of Kansas)
- Teresa Puig (CSIC)
Magnetoencephalography (MEG) is an alternative noninvasive brain imaging technique that measures the magnetic field generated by neuron activities. MEG offers better temporal resolution than current imaging systems. Superconductor Quantum Interface Devices (SQUIDs) are the sensors used in MEG systems. High- transition-temperature-superconductor (HTS) SQUIDs could potentially improve the...
Adding nanophase defects to YBa2Cu3O7-δ (YBCO) superconductor thin films is well-known to enhance flux pinning, resulting in an increase in current density (Jc). While many previous studies focused on single phase additions, the addition of several phases simultaneously shows promise in improving current density by combining different pinning mechanisms. This paper compares the effect of the...
Understanding the reasons for variations in critical current (Ic) of production coated conductors is becoming increasingly important for magnet builders. To provide such information, we use a reel-to-reel Ic measurement system, YateStar, to characterize the conductors. YateStar is a hybrid device allowing transport Ic measurement in two orthogonal fields and remanent magnetization evaluation...
To study the effect of Y2O3 doping on YBCO films under magnetic field. Different content of Y2O3 doped YBCO films are fabricated by self-developed MOCVD. The morphological features of YBCO films were characterized by FESEM. The crystal structure of YBCO film was determined by XRD and Raman. The surface morphology was investigated by AFM.The relationship between the Jc of YBCO films and Y2O3...
High concentration isotropic artificial pinning centers (APCs) are desirable for high-field applications. In this work, we explore double-doping (DD) of BaZrO3 nanorods (BZO-NRs) and 3 vol.% Y2O3 nanoparticles (Y2O3-NPs) in YBCO as the BZO-NRs concentration is varied in the range of 2-6 vol.%. When comparing with YBCO counterparts with single-doping (SD) of BZO-NRs which shows a monotonic...
Compared with the traditional TFA-MOD methods, the PAFF-MOD method can significantly eliminate the toxicity of fluoride. In addition, the heat treatment process can be simplified and the heat treatment time can be shortened greatly. In this work, a polymer-assisted fluorine-free metal organic deposition (PAFF-MOD) was used to prepare Y2O3-doped YBCO thin film on CeO2-buffered hastelloy. The...
