An electron spin resonance study of Eu doping effect in La_(4/3)Sr_(5/3)Mn_2O_7 single crystal |
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| Affiliation: | a Department of Physics, Baotou Normal University, Baotou 014030, China;
b Inner Mongolia Key Laboratory for Utilization of Bayan Obo Multi-Metallic Resources, and Elected State Key Laboratory, Inner Mongolia University of Science and Technology, Baotou 014010, China |
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| Abstract: | The effect of Eu3+ ion doping in the La sites of single-crystal La4/3Sr5/3Mn2O7 was investigated. Electron spin resonance (ESR) was applied to La4/3Sr5/3Mn2O7 and (La0.8Eu0.2)4/3Sr5/3Mn2O7 single crystals. A phase separation and phase transitions were observed from the ESR spectra data. Between 350 K and 300 K, both paramagnetic resonance (PMR) and anisotropic ferromagnetic resonance (FMR) lines were observed in the ab plane and the c axis direction, suggesting a coexistence of the paramagnetic (PM) phase and the ferromagnetic (FM) phase. The magnetization measurement reveals a spin-glass-like behavior in single-crystal (La0.8Eu0.2)4/3Sr5/3Mn2O7 below the temperature of spin freezing Tf (～ 29.5 K). |
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| Keywords: | electron spin resonance manganite single crystal phase separation anisotropy |
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