Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties

An electron spin resonance study of Eu doping effect in La4/3Sr5/3Mn2O7 single crystal

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Published 15 May 2014 • 2014 Chinese Physical Society and IOP Publishing Ltd
, , Citation He Li-Min et al 2014 Chinese Phys. B 23 077601 DOI 10.1088/1674-1056/23/7/077601

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1 Department of Physics, Baotou Normal University, Baotou 014030, China

2 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

Dates

  1. Received 15 November 2013
  2. Published
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1674-1056/23/7/077601

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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