Computational Design of Rare-Earth Reduced Permanent Magnets  

作　　者：Alexander Kovacs Johann Fischbacher Markus Gusenbauer Harald Oezelt Heike C.Herper Olga Yu.Vekilova Pablo Nieves Sergiu Arapan Thomas Schrefl 

机构地区：[1]Department for Integrated Sensor Systems,Danube University Krems,Wiener Neustadt 2700,Austria [2]Department of Physics and Astronomy,Uppsala University,Uppsala 75120,Sweden [3]International Research Centre in Critical Raw Materials for Advanced Industrial Technologies,University of Burgos,Burgos 09001,Spain [4]IT4Innovations,VSB-Technical University of Ostrava,Ostrava-Poruba 70833,Czech Republic

出　　处：《Engineering》2020年第2期148-153,共6页工程（英文）

基　　金：This work was supported by the EU H2020 project NOVAMAG(686056)and the Austrian Science Fund FWF(I3288-N36).Sergiu Arapan and Pablo Nieves acknowledge the European Regional Development Fund in the IT4Innovations National Supercomputing Center—path to exascale project(CZ 02.1.01/0.0/0.0/16-013/0001791)within the Operational Programme Research,Development and Education,and IT4Innovations computational resources allocated within projects OPEN-11-33,OPEN-14-23,and OPEN-17-14.

摘　　要：Multiscale simulation is a key research tool in the quest for new permanent magnets.Starting with first principles methods,a sequence of simulation methods can be applied to calculate the maximum possible coercive field and expected energy density product of a magnet made from a novel magnetic material composition.Iron(Fe)-rich magnetic phases suitable for permanent magnets can be found by means of adaptive genetic algorithms.The intrinsic properties computed by ab initio simulations are used as input for micromagnetic simulations of the hysteresis properties of permanent magnets with a realistic structure.Using machine learning techniques,the magnet’s structure can be optimized so that the upper limits for coercivity and energy density product for a given phase can be estimated.Structure property relations of synthetic permanent magnets were computed for several candidate hard magnetic phases.The following pairs(coercive field(T),energy density product(kJ·m^-3))were obtained for iron-tin-antimony(Fe3Sn0.75Sb0.25):(0.49,290),L10-ordered iron-nickel(L10 FeNi):(1,400),cobalt-iron-tantalum(CoFe6Ta):(0.87,425),and manganese-aluminum(MnAl):(0.53,80).

关 键 词：RARE-EARTH PERMANENT MAGNETS MICROMAGNETICS 

分 类 号：TM273[一般工业技术—材料科学与工程]