期刊
PHYSICAL REVIEW B
卷 95, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.115151
关键词
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资金
- Dutch Foundation for Fundamental Research of Matter (FOM)
- Netherlands Organisation for Scientific Research (NWO)
- KAKENHI [15H05884, 15H05882, 15K21732, 16H04006, 15H05745]
- Grants-in-Aid for Scientific Research [16H04006, 15H05745, 15H05884] Funding Source: KAKEN
We report thermal expansion measurements on a single crystal of the superconducting ferromagnet UCoGe for magnetic fields applied along the main orthorhombic axes. The thermal expansion cell was mounted on a piezoelectric rotator in order to fine-tune the magnetic field angle. The superconducting and magnetic phase diagram has been determined. With our bulk technique we confirm the S shape of the upper-critical field, B-c2, for B parallel to b and reinforcement of superconductivity above 6 T. At the same time the Curie point shifts towards lower temperatures on increasing the field along the b axis. This lends further support to theoretical proposals of spin-fluctuation-mediated reinforcement of superconductivity for B parallel to b.
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