Theory of spin-wave excitations of metallic A-type antiferromagnetic manganites

Article

关键词: DOUBLE-EXCHANGE;    NEUTRON-DIFFRACTION;    MAGNETIC-PROPERTIES;    CHARGE;    TRANSITION;    PHASE;    ORDER;    MODEL;    PR1-XSRXMNO3;    RESISTIVITY;   

DOI  :  10.1103/PhysRevB.64.092403

来源: SCIE

【 摘 要 】

The spin dynamics of the metallic A-type antiferromagnetic manganites is studied. An effective nearest-neighbor Heisenberg spin-wave dispersion is derived from the double-exchange model taking into account the superexchange interaction between the core spins. The result of inelastic neutron-scattering experiment on Nd0.45Sr0.55MnO3 is qualitatively reproduced. Comparing theory with experimental data, two main parameters of the model-nearest-neighbor electron-transfer amplitude and superexchange coupling between the core spins-are estimated.

【 授权许可】

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