学科分类
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1 个结果
  • 简介:Themeasurementoflow-fieldsusceptibilityXasafunctionoftemperatureTforLa2/3Ca1/3MnO3showsasignificantdownturnin1/X(T)abovetheCurietemperatureTc,abehaviourgenerallyobservedinperovskitemanganites.Suchadownturnisarguedtobeduetothesegregationofferromagneticclusterswithlargerspinsintheparamagneticmatrix.Basedonthisconsideration,aphenomenologicalexpressionforX(T)isproposed,inwhichthetotalsusceptibilityisassumedtobeasumoftwosusceptibilitiesarisingfrommagneticentitiesinthePMbackgroundandtheFMclusterswithT-dependenteffectivespins,respectively.TheresultisingoodagreementwiththeexperimentaldataobtainedinLa2/3Ca1/3MnO3.

  • 标签: 抗磁化系数 居里温度 钙钛矿 亚锰酸盐