Spin cycloid quenching in Nd3 +-substituted BiFeO 3

P. Chen, Ö Günaydin-Şen, W. J. Ren, Z. Qin, T. V. Brinzari, S. McGill, S. W. Cheong, J. L. Musfeldt

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37 Scopus citations

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.

Original languageEnglish (US)
Article number014407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number1
DOIs
StatePublished - Jul 10 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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