Magnetic Behaviours of a Random Magnet, Ni p Mg (1-p) (OH 2 )
Magnetic Behaviours of a Random Magnet, Ni p Mg (1-p) (OH 2 )
复制标题
随机磁铁 Ni p Mg (1-p) (OH 2 ) 的磁性行为
DOI：
10.1143/jpsj.39.317
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发表时间：
1975
影响因子：
1.7
通讯作者：
I. Tsujikawa
中科院分区：
文献类型：
--
作者：
T. Enoki;I. Tsujikawa
通过磁化率和磁化强度的测量，研究了Ni(OH) 2的混合晶体Ni p Mg (1- p) (OH) 2作为准二维反铁磁体Ni(OH) 2的随机稀释磁体的磁性行为。在纯Ni(OH) 2中，三种交换相互作用的估计如下：j1 / k ～ 2.70 k, j2 / k ～ -0.28 k和j3 / k ～ -0.09 k。各向异性能量主要来源于晶体的各向异性。在Ni p Mg (1- p) (OH) 2中，顺磁化率远高于临界温度T N (p)，对于浓度\(0.4{\lesssim}p{\le}1\)，服从居里-魏斯定律。在p ～ 0.4以下，磁化率服从居里-魏斯定律，但在低温区和高温区具有不同的居里常数和魏斯常数。这可能是由于铁磁在较低温度区域的短程有序造成的。
Magnetic behaviours of the mixed crystal, Ni p Mg (1- p ) (OH) 2 , as a randomly diluted magnet of the quasi-two dimensional antiferromagnet, Ni(OH) 2 , were investigated by measurements of the susceptibility and the magnetization. In pure Ni(OH) 2 , the three kinds of exchange interactions were estimated as follows: J 1 / k ∼2.70 K, J 2 / k ∼-0.28 K and J 3 / k ∼-0.09 K. The anisotropy energy mainly comes form the crystalline anisotropy. In Ni p Mg (1- p ) (OH) 2 the paramagnetic susceptibilities obeyed the Curie-Weiss law well above the critical temperature, T N ( p ), for the concentration, \(0.4{\lesssim}p{\le}1\). Below p ∼0.4, the susceptibilities obeyed the Curie-Weiss law, but with the different Curie and the Weiss constants in the lower and higher temperature regions. This may result from ferromagnetic short range order in the lower temperature region.