Pressure-Induced Local Moment Magnetism in the Nonmagnetic Heavy Fermion Compound Yb2Ni2Al
Pressure-Induced Local Moment Magnetism in the Nonmagnetic Heavy Fermion Compound Yb2Ni2Al
复制标题
非磁性重费米子化合物 Yb2Ni2Al 中压力诱导的局部矩磁性
DOI：
10.1103/physrevlett.81.4947
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发表时间：
1998
影响因子：
8.6
通讯作者：
F. Steglich
中科院分区：
文献类型：
--
作者：
H. Winkelmann;M. Abd;H. Micklitz;J. Sanchez;C. Geibel;F. Steglich
利用170 Yb Mössbauer效应、电阻和x射线衍射技术对非磁性（NM）重费米子（HF）化合物yb2ni2al进行高压测量，发现在p> 8gpa和低于2k时，从NM HF态到Yb （4f）局部矩的磁性有序态（1.8 K和9 GPa时μ Yb≈1 μ B）发生了交叉。这种交叉与Yb价态的变化无关。在磁畴中，我们发现了具有一阶相变特征的离散磁相和非磁相共存。
High pressure measurements on the nonmagnetic (NM) heavy fermion (HF) compound Yb 2 Ni 2 Al using the 170 Yb Mössbauer effect, electrical resistance, and x-ray diffraction techniques reveal for p> 8 GPa and below 2 K a crossover from the NM HF state to a magnetically ordered state of Yb (4 f) local moments (μ Yb≈ 1 μ B at 1.8 K and 9 GPa). This crossover is not connected with a change of the Yb valence state. In the magnetic regime, we find a coexistence of discrete magnetic and nonmagnetic phases characteristic of a first order phase transition.