Inhomogeneous magnetism in La-doped CaMnO3. II. Nanometric-scale spin clusters and long-range spin canting

Article

关键词: DOUBLE-EXCHANGE MODEL;    FERROMAGNETIC KONDO MODEL;    PHASE-SEPARATION;    NEUTRON-SCATTERING;    ELECTRONIC MODELS;    MANGANITES;    DIAGRAM;    ANTIFERROMAGNETISM;    MAGNETORESISTANCE;    RESISTIVITY;   

DOI  :  10.1103/PhysRevB.68.134440

来源: SCIE

【 摘 要 】

Neutron measurements on Ca1-xLaxMnO3 (0.00less than or equal toxless than or equal to0.20) reveal the development of magnetic droplets showing a liquidlike intercluster spatial distribution. The average size of the droplets is similar to10 Angstrom, the concentration of which in the G-AFM matrix being proportional to x (one cluster per similar to60 doped electrons). In addition, a long-range ordered ferromagnetic component is observed for 0.05less than or similar toxless than or similar to0.14. This component is perpendicularly coupled to the simple G-type antiferromagnetic (G-AFM) structure of the undoped compound, which is a signature of a G-AFM+FM spin-canted state. The possible relationship between cluster formation and the stabilization of a long-range spin canting for intermediate doping is discussed.

【 授权许可】

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