Effect of Pressure on the Néel Temperature and the Electrical Resistivity of α-Mn and α-Mn 0.92 Fe 0.08 Alloy
Effect of Pressure on the Néel Temperature and the Electrical Resistivity of α-Mn and α-Mn 0.92 Fe 0.08 Alloy
复制标题
压力对α-Mn和α-Mn 0.92 Fe 0.08合金尼尔温度和电阻率的影响
DOI：
10.1143/jpsj.37.1285
复制
发表时间：
1974
影响因子：
1.7
通讯作者：
N. Mōri
中科院分区：
文献类型：
--
作者：
N. Mōri
测量了反铁磁α-Min和α-Min 0.92 Fe 0.08合金从4.2K到室温、直至约8 kbar的电阻率随压力-温度的变化。估算了剩余电阻率、自旋无序电阻率和Neel温度TN的压力系数。基于RKKY机制，从磁超区边界效应的角度讨论了矫顽力的压力依赖性。结果表明，对于纯α-Min，在绝对零温下，电阻率比无磁隙时提高了约10倍.在考虑RKKY相互作用的情况下，讨论了T_N的压力依赖性，并与大气压下T_N随电子原子比的变化进行了比较.
Measurements of the pressure-temperature variations of the electrical resistivity were made on the antiferromagnetic α-Min and the α-Min 0.92 Fe 0.08 alloy from 4.2 K to room temperature and up to about 8 kbar. The pressure coefficients of the residual resistivity, the spindisorder resistivity and the Neel temperature T N are estimated. The pressure dependence of the resistivtity is discussed in terms of the magnetic superzone boundary effect based on the RKKY mechanism. It is suggested that the resistivity is enhanced by about ten times larger than that in the absence of the magnetic gaps at absolute zere temperature for pure α-Min. The pressure dependence of T N is also discussed with the RKKY interaction, comparing to the variation of T N with the electron-atom ratio at atmospheric pressure.