Magnetoelectricity coupled exchange bias in BaMnF${}_4$

Abstract

Multiferroic BaMnF${}_4$ powder were prepared by hydrothermal method. Hysteretic field dependent magnetization curve at 5 K confirms the weak ferromagnetism aroused from the canted antiferromagnetic spins by magnetoelectric coupling. The blocking temperature of 65 K for exchange bias coincides well with the peak at 65 K in the zero-field cooled temperature-dependent magnetization curve, which has been assigned to the onset temperature of two-dimensional antiferromagnetism. An upturn kink of exchange field and coercivity with decreasing temperature was observed from 40 K to 20 K, which is consistent with the two-dimensional to three-dimensional antiferromagnetic transition at Néel temperature (~26 K). In contrast to the conventional mechanism of magnetization pinned by interfacial exchange coupling in multiphases, the exchange bias in BaMnF${}_4$ is argued to be a bulk effect in single phase, due to the magnetization pinned by the polarization through magnetoelectric coupling.

arXiv comment26 pages, 7 figures

References in corpus (9)

• Multiferroicity, The coupling between magnetic and polarization
• Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces
• Memory and superposition in a spin glass
• Surface phase separation in nanosized charge-ordered manganites
• Origin of ferroelectricity in the multiferroic barium fluorides BaMF4
• Antisite Disorder-induced Exchange Bias Effect in Multiferroic Y2CoMnO6
• Comment on "Exchange bias-like phenomenon in SrRuO3" by Pi et al (Appl. Phys. Lett. 88, 102502 (2006)
• Spin canted magnetism, decoupling of charge and spin ordering in NdNiO${}_3$
• Disorder-induced mechanism for positive exchange bias fields

Cited by in corpus (9)

• Two-dimensional ferromagnetic-ferroelectric multiferroics in violation of the d0 rule
• Ferroelectric Ferrimagnetic LiFe${}_2$F${}_6$: Charge Ordering Mediated Magnetoelectricity
• Direct magnetization-polarization coupling in BaCuF${}_4$ fluoride
• BaMF${}_4$ (M = Mn, Co, Ni): New Electrode Materials for Hybrid Supercapacitor with Layered Polar Structure
• Uncompensated-spins Induced Weak Ferromagnetism in Ca3Mn2O7: Magneto-conductive and dual Magneto-capacitive Effects
• Evolution of magnetic phase in two dimensional van der Waals Mn${}_{1-x}$Ni${}_x$PS${}_3$ single crystals
• Strong room-temperature blue-violet photoluminescence of multiferroic BaMnF${}_4$
• Magnetic phase transition induced ferroelectric polarization in BaFeF4 with room temperature weak ferromagnetism
• Synthesis, Optical, and Magnetic Properties of Ba${}_2$Ni${}_3$F${}_{10}$ Nanowires