STABILITY THEORY OF MAGNETIC PHASES FOR A SIMPLE MODEL OF TRANSITION METALS
STABILITY THEORY OF MAGNETIC PHASES FOR A SIMPLE MODEL OF TRANSITION METALS
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DOI：
10.1103/physrev.142.350
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发表时间：
1966-01-01
期刊：
影响因子：
--
通讯作者：
PENN, DR
中科院分区：
文献类型：
--
作者：
PENN, DR
本文基于一个高度简化的准粒子能带模型，对过渡金属及合金中所观察到的磁性分布作了半定量解释。它只取决于两个参数，金属的价态（d电子的数目）和准粒子相互作用强度与带宽的比值，C 0 E“”。C0 E "随着化合价的增加而增加，从5d过渡金属到3d过渡金属，C0 E“也增加.铁磁性被认为是最有可能的那些金属与大的C 0 E "和价远离5。反铁磁性被发现发生在5价左右，更复杂的状态，如亚铁磁和螺旋自旋密度波状态，这是明确描述。有人建议，在过渡金属合金的比热发生的峰值作为一个合金跨越3 d过渡系列是密切相关的带结构的变化所造成的有序，至少对于铬锰系统。
A semiquantitative explanation of the observed distribution of magnetism in the transition metals and alloys is made based on a highly simplified quasiparticle band model. It depends on only two parameters, the valence (number of d electrons) of the metal and the ratio of quasiparticle interaction strength to band-width, C 0 E′′. The quantity C 0 E′′ increases with valence and also increases as one goes from the 5 d transition metals to the 3 d transition metals. Ferromagnetism is found to be most likely for those metals with large C 0 E′′ and a valence well away from five. Antiferromagnetism is found to occur for a valence of around five, as do the more complex states such as the ferrimagnetic and spiral-spin-density-wave states, which are explicitly described. It is suggested that the peak in the specific heat of the transition-metal alloys that occurs as one alloys across the 3 d transition series is closely related to changes in the band structure caused by ordering, at least for the Cr-Mn system.