Intriguing complex magnetism of Co in RECoAsO (RE=La, Nd, and Sm)
Intriguing complex magnetism of Co in RECoAsO (RE=La, Nd, and Sm)
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RECoAsO 中 Co 的迷人复杂磁性（RE=La、Nd 和 Sm）
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
V. Awana
中科院分区：
文献类型：
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作者：
A. Pal;M. Tropeano;S. D. Kaushik;Mushahid Hussain;H. Kishan;V. Awana
在RECoAsO(RE=La，ND，Sm)中加入非磁性的La，Sm后，Co的体本征磁性发生了显著的变化。虽然巡游铁磁性出现在80-100K以下且饱和磁矩很小，但Sm在57K和45K以及Nd在69K和14K观察到典型的反铁磁(Tn1，Tn2)相变。等温磁化图也证明了这一点。很明显，Sm/ND磁矩与相邻层中有序的Co自旋相互作用，从而将铁磁(FM)有序转变为AFM。
The bulk intrinsic magnetism of Co changes dramatically when nonmagnetic La Sm and Nd in RECoAsO (RE=La, Nd, Sm). Although the itinerant ferromagnetism occurs below 80-100 K with small saturation moment, typical anti-ferromagnetic (AFM) transitions (TN1, TN2) are observed at 57 K and 45 K for Sm and at 69 K and 14 K for Nd. This is evidenced in isothermal magnetization plots as well. It is clear that Sm/Nd magnetic moments interact with the ordered Co spins in adjacent layer and thus transforms the ferromagnetic (FM) ordering to AFM.