Magnetic relaxation in La0.250Pr0.375Ca0.375MnO3 with varying phase separation

Article

关键词: METAL-INSULATOR-TRANSITION;    SPIN-GLASS INSULATOR;    COLOSSAL MAGNETORESISTANCE;    MANGANITES;    LA0.5CA0.5MNO3;    STATE;    FIELD;    FERROMAGNETISM;    PERCOLATION;    PEROVSKITE;   

DOI  :  10.1103/PhysRevB.65.174426

来源: SCIE

【 摘 要 】

We have studied the magnetic relaxation properties of the phase-separated manganite compound La0.250Pr0.375Ca0.375MnO3. A series of polycrystalline samples was prepared with different sintering temperatures, resulting in a continuous variation of phase fraction between metallic (ferromagnetic) and charge-ordered phases at low temperatures. Measurements of the magnetic viscosity show a temperature and field dependence which can be correlated to the static properties. Common to all the samples, there appears to be two types of relaxation processes: at low fields associated with the reorientation of ferromagnetic domains and at higher fields associated with the transformation between ferromagnetic and nonferromagnetic phases.

【 授权许可】

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