Spontaneous formation of an exchange-spring composite via magnetic phase separation in Pr1-xCaxCoO3

Article

关键词: SPIN-STATE TRANSITION;    MANGANITES;    POLARONS;    LACOO3;   

DOI  :  10.1103/PhysRevB.82.100411

来源: SCIE

【 摘 要 】

We present a neutron-diffraction, small-angle scattering, and magnetometry study of the narrow bandwidth perovskite cobaltite Pr1-xCaxCoO3, demonstrating an unusual form of magnetoelectronic phase separation where long-range ordered ferromagnetism coexists spatially with short-range ferromagnetism. The two phases have very different coercivities and, remarkably, are strongly exchange coupled. The electronic phase separation thus leads to spontaneous formation of a hard-soft nanocomposite, exhibiting prototypical exchange-spring behavior in the absence of chemical interfaces.

【 授权许可】

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