Design of soft magnetic materials  

作　　者：Ananya Renuka Balakrishna Richard D.James 

机构地区：[1]Aerospace and Mechanical Engineering,University of Southern California,Los Angeles,CA,90089,USA [2]Aerospace and Engineering Mechanics,University of Minnesota,Minneapolis,MN,55455,USA

出　　处：《npj Computational Materials》2022年第1期17-26,共10页计算材料学（英文）

基　　金：The authors thank NSF(DMREF-1629026)and ONR(N00014-18-1-2766)for partial support of this work.

摘　　要：We present a strategy for the design of ferromagnetic materials with exceptionally low magnetic hysteresis,quantified by coercivity.In this strategy,we use a micromagnetic algorithm that we have developed in previous research and which has been validated by its success in solving the“Permalloy Problem”—the well-known difficulty of predicting the composition 78.5%Ni of the lowest coercivity in the Fe–Ni system—and by the insight it provides into the“Coercivity Paradox”of W.F.Brown.Unexpectedly,the design strategy predicts that cubic materials with large saturation magnetization ms and large magnetocrystalline anisotropy constant κ_(1) will have low coercivity on the order of that of Permalloy,as long as the magnetostriction constantsλ_(100),λ_(111)are tuned to special values.The explicit prediction for a cubic material with low coercivity is the dimensionless number(c_(11)−c_(12))λ_(100)^(2)/(2_(κ_(1)))=81 for〈100〉easy axes.The results would seem to have broad potential application,especially to magnetic materials of interest in energy research.

关 键 词：MAGNETIC CUBIC exceptional 

分 类 号：TB30[一般工业技术—材料科学与工程]