Magnetic phase transformation in La0.7-xBixSr0.3MnO3 (0.25 ≤ x ≤ 0.40)

Souza, Anita D and Rayaprol, Sudhindra and Sagdeo, Archana and Sinha, A K and Daivajna, Mamatha D (2020) Magnetic phase transformation in La0.7-xBixSr0.3MnO3 (0.25 ≤ x ≤ 0.40). Journal of magnetism and Magnetic materials, 511. ISSN 0304-8853

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Abstract

We have observed cross over from Ferromagnetism (FM) to Anti-ferromagnetism (AFM) accompanied by spin lattice coupling in La0.7-xBixSr0.3MnO3 as La is partially replaced by Bi (0.25 ≤ x ≤ 0.40) through structural, magnetization and electrical resistivity studies. Ferromagnetic metallic (FMM) phase observed in x = 0.25 sample transforms to antiferromagnetic insulating (AFI) phase with increasing Bi content (x = 0.40). The step like behavior in M(H), i.e. the metamagnetic transition, describes the field induced antiferromagnetic to fer�romagnetic transition in x = 0.30 and 0.35 samples. The irreversibility in the field dependent resistivity and magnetization suggests the competitive phase coexistence, between AFM and FM phases, in x = 0.30 and 0.35 samples. The anomaly in the structural parameters across the electrical and magnetic transition observed from the analysis of synchrotron X-ray diffraction data, at low temperatures, establishes a strong interplay between spin lattice coupling in all four samples studied here. The present study thus clearly brings out cross over from FMM to AFI state as Bi concentration increases in La0.7-xBixSr0.3MnO3.

Item Type: Article
Uncontrolled Keywords: Magnetically ordered materials Solid state reaction Magnetization X-ray diffraction
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 08 Apr 2022 10:11
Last Modified: 08 Apr 2022 10:11
URI: http://eprints.manipal.edu/id/eprint/158570

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