MAGNETIC ORDER AND FLUCTUATIONS IN SUPERCONDUCTING UPT3
MAGNETIC ORDER AND FLUCTUATIONS IN SUPERCONDUCTING UPT3
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DOI：
10.1103/physrevlett.60.615
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发表时间：
1988-02-15
影响因子：
8.6
通讯作者：
HUFNAGL, J
中科院分区：
文献类型：
--
作者：
AEPPLI, G;BUCHER, E;HUFNAGL, J
中子衍射表明，超导UPT3是一个反铁磁体，其有序矩为(0.0 2±0.0 1)μB，Néel温度(T N)为5 K，其平方序参数是从T N到超导转变温度Tc=0.5K的线性函数，在此温度下它停止演化.非弹性中子散射表明，涨落力矩是强关联的，波矢接近有序波矢的涨落特征能量为0.2 meV≊4kTc.声发射
Neutron diffraction shows that superconducting UPt 3 can be an antiferromagnet with an ordered moment of (0.02±0.01) μ B and a Néel temperature (T N) of 5 K. The squared order parameter is linear function of temperature from T N to the superconducting transition temperature, T c= 0.5 K, below which it ceases to evolve. Inelastic neutron scattering demonstrates that the fluctuating moments are strongly correlated; the characteristic energy for fluctuations with wave vectors close to the ordering wave vector is 0.2 meV≊ 4 kT c.. AE