Magnetic field evolution of critical end point in UGe2

Magnetic field evolution of critical end point in UGe2
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UGe2 关键终点的磁场演化

DOI:
10.1088/1742-6596/273/1/012017
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发表时间:
2011
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
J. Flouquet
J. Flouquet
中科院分区:
--
文献类型:
--
作者:
V. Taufour;A. Villaume;D. Aoki;G. Knebel;J. Flouquet

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报道了对铁磁重费米子超导体 UGe2 的新测量。通过应变计进行的热膨胀测量使我们能够精确定位大力矩铁磁相 FM2 (M0 = 1.5 μB) 和小力矩相 FM1 (M0 = 0.9 μB) 之间的一阶边界的临界端点 (CEP)。将 CEP 的场依赖性与三临界点以上的顺磁-FM1 转变的场依赖性进行了比较。
New measurements on the ferromagnetic heavy-fermion superconductor UGe2 are reported. Thermal expansion measurements via strain gage allow us to locate precisely the critical end point (CEP) of the first order boundary between the large moment ferromagnetic phase FM2 (M0 = 1.5 μB) and the small moment phase FM1 (M0 = 0.9 μB). The field dependence of the CEP is compared with that of the paramagnetic-FM1 transition above the tricritical point.