Origin of ferroelectricity in orthorhombic LuFeO3

Ujjal Chowdhury, Sudipta Goswami, Amritendu Roy, Shailendra Rajput, A. K. Mall, R. Gupta, S. D. Kaushik, V. Siruguri, S. Saravanakumar, S. Israel, R. Saravanan, A. Senyshyn, T. Chatterji, J. F. Scott, Ashish Garg, and Dipten Bhattacharya
Phys. Rev. B 100, 195116 – Published 12 November 2019
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Abstract

We demonstrate that small but finite ferroelectric polarization (0.01μC/cm2) emerges in orthorhombic LuFeO3 (Pnma) at TN (600 K) because of commensurate (k=0) and collinear magnetic structure. The synchrotron x-ray and neutron diffraction data suggest that the polarization could originate from enhanced bond covalency together with subtle contribution from the lattice. The theoretical calculations indicate enhancement of bond covalency as well as the possibility of structural transition to the polar Pna21 phase below TN. The Pna21 phase, in fact, is found to be energetically favorable below TN in orthorhombic LuFeO3 (albeit with very small energy difference) than in isostructural and nonferroelectric LaFeO3 or NdFeO3. Application of electric field induces finite piezostriction in LuFeO3 via electrostriction resulting in clear domain contrast in piezoresponse force microscopy images.

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  • Received 29 August 2017
  • Revised 4 September 2019

DOI:https://doi.org/10.1103/PhysRevB.100.195116

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Ujjal Chowdhury1,*, Sudipta Goswami2,†, Amritendu Roy3, Shailendra Rajput4, A. K. Mall5, R. Gupta5,6, S. D. Kaushik7, V. Siruguri7, S. Saravanakumar8, S. Israel9, R. Saravanan10, A. Senyshyn11, T. Chatterji12, J. F. Scott13, Ashish Garg4,‡, and Dipten Bhattacharya1,§

  • 1Nanostructured Materials Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
  • 2Department of Solid State Physics, Indian Association for the Cultivation of Science, Kolkata 700032, India
  • 3School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology, Bhubaneswar 752050, India
  • 4Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur 208016, India
  • 5Materials Science Programme, Indian Institute of Technology, Kanpur 208016, India
  • 6Department of Physics, Indian Institute of Technology, Kanpur 208016, India
  • 7UGC-DAE Consortium for Scientific Research, Bhabha Atomic Research Centre, Mumbai 400085, India
  • 8Department of Physics, Kalasalingam University, Krishnakoil 626126, India
  • 9Department of Physics, The American College, Madurai 625002, India
  • 10Department of Physics, The Madura College, Madurai 625011, India
  • 11Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universitat Munchen, D-85747 Garching b. Munchen, Germany
  • 12Science Division, Institut Laue-Langevin, BP 156, 38042 Grenoble Cedex 9, France
  • 13School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, United Kingdom

  • *Present address: Central Water and Power Research Station, Khadakwasla, Pune 411024, India.
  • Present address: School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India.
  • ashishg@iitk.ac.in
  • §dipten@cgcri.res.in

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Issue

Vol. 100, Iss. 19 — 15 November 2019

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