Magnetism Study of Spin Correlations in Bi0.5Ca0.5MnO3

Qiang Wang

doi:10.4028/www.scientific.net/AMR.535-537.1233

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 535-537Magnetism Study of Spin Correlations in...

Magnetism Study of Spin Correlations in Bi_0.5Ca_0.5MnO₃

Abstract:

Magnetic properties of polycrystalline Bi_0.5Ca_0.5MnO₃ are investigated by means of magnetization and electron spin resonance (ESR). The charge ordering (CO) and antiferromagnetic (AFM) transitions are determined from the temperature dependence of magnetization and ESR parameters. It is found that weak ferromagnetic (FM) spin correlations exist in the paramagnetic (PM) state. With temperature decrease, FM spin correlations are suppressed by gradually increased AFM spin correlations in the CO state and frozen in the long range AFM state at the AFM transition temperature TN. Our study suggests that the competition between FM and AFM spin correlations is accompanied by a change of spin-orbit coupling and spin-lattice interaction.

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Advanced Materials Research (Volumes 535-537)

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1233-1236

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https://doi.org/10.4028/www.scientific.net/AMR.535-537.1233

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Online since:

June 2012

Authors:

Qiang Wang

Keywords:

Charge Ordering, Electron Spin Resonance, Magnetic Interactions, Manganite

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