Structural-modulation-driven spin canting and reentrant glassy magnetic phase in ferromagnetic Lu2MnNiO6

Kaustuv Manna, A. K. Bera, Manish Jain, Suja Elizabeth, S. M. Yusuf, and P. S. Anil Kumar
Phys. Rev. B 91, 224420 – Published 15 June 2015

Abstract

Unusual behavior of reentrant spin-glass (RSG) compound Lu2MnNiO6 has been investigated by magnetometry and neutron diffraction. The system possesses a ferromagnetic (FM) ordering below 40 K and undergoes a RSG transition at 20 K. Additionally, Lu2MnNiO6 retains memory effect above the glassy transition till spins sustain ordering. A novel critical behavior with unusual critical exponents (β=0.241 and γ1.142) is observed that indicates a canting in the spin structure below the ferromagnetic transition (TC). A comprehensive analysis of temperature-dependent neutron diffraction data and first-principles calculations divulge that a structural distortion induced by an octahedral tilting results in a canted spin structure below TC.

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  • Received 26 January 2015
  • Revised 10 May 2015

DOI:https://doi.org/10.1103/PhysRevB.91.224420

©2015 American Physical Society

Authors & Affiliations

Kaustuv Manna1,2, A. K. Bera3,4, Manish Jain1, Suja Elizabeth1, S. M. Yusuf3, and P. S. Anil Kumar1

  • 1Department of Physics, Indian Institute of Science, Bangalore 560012, India
  • 2Leibniz-Institute for Solid State and Materials Research, (IFW)-Dresden, D-01171 Dresden, Germany
  • 3Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
  • 4Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany

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Issue

Vol. 91, Iss. 22 — 1 June 2015

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