Work

Composition-, temperature-, and field- driven magnetic phase transitions in Bi0.9Ca0.1Fe1-xMnxO3 multiferroics

Year: 2024

Type: article

Abstract: A magnetometric study of Bi 0.9 Ca 0.1 Fe 1-x Mn x O 3 (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 Ca 2+ -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.

Source: Journal of Magnetism and Magnetic Materials

DOI: 10.1016/j.jmmm.2024.172703

Authors: V.A. Khomchenko, M. Das, J.A. Paixão

Institutions: Centro de Física da Universidade de Coimbra, University of Coimbra

Language: English

Topic: Multiferroics and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,120

Funder: Fundação para a Ciência e a Tecnologia