{"title":"Composition-, temperature-, and field- driven magnetic phase transitions in Bi0.9Ca0.1Fe1-xMnxO3 multiferroics","authors":"V.A. Khomchenko, M. Das, J.A. Paixão","doi":"10.1016/j.jmmm.2024.172703","DOIUrl":null,"url":null,"abstract":"<div><div>A magnetometric study of Bi<sub>0.9</sub>Ca<sub>0.1</sub>Fe<sub>1-x</sub>Mn<sub>x</sub>O<sub>3</sub> (0.3 ≤ <em>x</em> ≤ 0.5) compounds was conducted over broad temperature and field ranges to clarify the impact of Mn substitution on the magnetic properties of Ca<sup>2+</sup>-doped bismuth ferrite-based multiferroics near the polar-antipolar phase boundary. Room-temperature X-ray diffraction measurements confirm the stability of the polar rhombohedral <em>R3c</em> structure up to <em>x</em> = 0.4, with a transition to the antipolar orthorhombic <em>Pnam</em> phase occurring through a mixed structural state at <em>x</em>≈ 0.45. Magnetic measurements of rhombohedral-structure samples reveal an evolution in magnetization behavior, indicative of a transformation from the cycloidal spin order, characteristic of low-doped bismuth ferrites, to a collinear antiferromagnetic arrangement as Mn content increases. Magnetic field modifies the collinear antiferromagnetic structure towards a canted antiferromagnetic one. The threshold field for the metamagnetic transformation decreases with decreasing temperature and increasing Mn concentration.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"614 ","pages":"Article 172703"},"PeriodicalIF":3.0000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetism and Magnetic Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304885324009946","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/1 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A magnetometric study of Bi0.9Ca0.1Fe1-xMnxO3 (0.3 ≤ x ≤ 0.5) compounds was conducted over broad temperature and field ranges to clarify the impact of Mn substitution on the magnetic properties of Ca2+-doped bismuth ferrite-based multiferroics near the polar-antipolar phase boundary. Room-temperature X-ray diffraction measurements confirm the stability of the polar rhombohedral R3c structure up to x = 0.4, with a transition to the antipolar orthorhombic Pnam phase occurring through a mixed structural state at x≈ 0.45. Magnetic measurements of rhombohedral-structure samples reveal an evolution in magnetization behavior, indicative of a transformation from the cycloidal spin order, characteristic of low-doped bismuth ferrites, to a collinear antiferromagnetic arrangement as Mn content increases. Magnetic field modifies the collinear antiferromagnetic structure towards a canted antiferromagnetic one. The threshold field for the metamagnetic transformation decreases with decreasing temperature and increasing Mn concentration.
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