Spin cycloid quenching in Nd3 +-substituted BiFeO 3

Document Type

Article

Publication Date

7-10-2012

Abstract

Chemical substitution is an effective method for tailoring the electronic and magnetic properties of functional materials. In this work, we employ magneto-optical spectroscopy to investigate the behavior of the cycloid → homogenous ordering transition in Bi 1-xNd xFeO 3. From the magneto-optical response, we construct a B-T-x phase diagram that shows how the critical field decreases with Nd3 + substitution, an effect that we model with Ginzburg-Landau free energy and harmonic cycloid approximations. Compared with nonmagnetic impurities like La3 +, Nd3 + is a stronger quencher and yields nonlinear B C-x behavior. Spiral magnetic order is quenched when x∼0.2. With increasing temperature (T<90 K), the critical field rises gently, a consequence of magnetic anisotropy changes with temperature. These findings extend our understanding of charge-spin coupling and advance the development of magnetic ferroelectrics. © 2012 American Physical Society.

Identifier

84863691438 (Scopus)

Publication Title

Physical Review B Condensed Matter and Materials Physics

External Full Text Location

https://doi.org/10.1103/PhysRevB.86.014407

e-ISSN

1550235X

ISSN

10980121

Issue

1

Volume

86

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