Specific heat of heavy-fermion URu 2 Si 2 in high magnetic fields
Specific heat of heavy-fermion URu 2 Si 2 in high magnetic fields
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高磁场中重费米子 URu 2 Si 2 的比热
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
A. Menovsky
中科院分区：
文献类型：
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作者：
N. H. Dijk;F. Bourdarot;J. Klaasse;I. Hagmusa;A. Menovsky
我们在高达 17.5 T 的磁场中对重费米子超导体 URu2Si2 进行了比热测量。比热的尖峰标志着 TN517.5 K 处的反铁磁转变，该转变在施加的磁场中转向较低的温度。为了描述低于 TN 的比热，我们使用了中子散射测量的激发光谱的特征。磁激发谱中反铁磁转变温度 TN 和能隙 D 的相对场依赖性可以通过 @12(B/B0) # 形式的单一比例关系来描述。 48.5 T 的标度场接近变磁跃迁场 B*540 T，其中重费米子态受到抑制。 @S0163-1829~97!05746-9#
We have performed specific-heat measurements on the heavy-fermion superconductor URu2Si2 in magnetic fields up to 17.5 T. A sharp peak in the specific heat signals the antiferromagnetic transition at TN517.5 K, which shifts to lower temperatures in applied magnetic fields. In order to describe the specific heat below TN , we have used the characteristic features of the excitation spectrum measured by neutron scattering. The relative field dependence of the antiferromagnetic transition temperature TN and the energy gap D in the magnetic excitation spectrum can be described by a single scaling relation of the form @12(B/B0) # . The scaling field of 48.5 T is close to the metamagnetic transition field B*540 T, where the heavy-fermion state is suppressed. @S0163-1829~97!05746-9#