期刊
PHYSICAL REVIEW B
卷 82, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.052502
关键词
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资金
- Netherlands Organization for Scientific Research (NWO)
- EC
- Deutsche Forschungsgemeinschaft [FOR 960]
We report measurements of the coefficient of linear thermal expansion, alpha(T), of the superconducting ferromagnet UCoGe. The data taken on a single-crystalline sample along the orthorhombic crystal axes reveal a pronounced anisotropy with the largest length changes along the b axis. The large values of the step sizes Delta alpha at the magnetic and superconducting phase transitions provide solid evidence for bulk magnetism and superconductivity. Specific-heat measurements corroborate bulk superconductivity. Thermal-expansion measurements in magnetic fields B parallel to a, b show Delta alpha at T(C) grows rapidly, which indicates the character of the ferromagnetic transition becomes first orderlike.
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