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Title: Short range ferromagnetic, magneto-electric, and magneto-dielectric effect in ceramic Co{sub 3}TeO{sub 6}

We report observation of magneto-electric and magneto-dielectric couplings along with short range ferromagnetic order in ceramic Cobalt Tellurate (Co{sub 3}TeO{sub 6}, CTO) using magnetic, structural, dielectric, pyroelectric, and polarization studies. DC magnetization along with dielectric constant measurements indicate a coupling between magnetic order and electrical polarization. A strong anomaly in the dielectric constant at ∼17.4 K in zero magnetic field indicates spontaneous electric polarization, consistent with a recent neutron diffraction study. Observation of weak short range ferromagnetic order at lower temperatures is attributed to the Griffiths-like ferromagnetism. Furthermore, magnetic field dependence of the ferroelectric transition follows earlier theoretical predictions, applicable to single crystal CTO. Finally, combined dielectric, pyroelectric, and polarization measurements suggest that the ground state of CTO may possess spontaneous symmetry breaking in the absence of magnetic field.
Authors:
;  [1] ;  [2] ;  [3] ; ; ;  [4]
  1. Homi Bhabha National Institute, Raja Ramanna Center for Advanced Technology, Indore 452013 (India)
  2. (India)
  3. Technical Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)
  4. School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067 (India)
Publication Date:
OSTI Identifier:
22494941
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 119; Journal Issue: 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CERAMICS; COUPLINGS; FERROELECTRIC MATERIALS; FERROMAGNETISM; FORECASTING; GROUND STATES; MAGNETIC FIELDS; MAGNETIZATION; MONOCRYSTALS; NEUTRON DIFFRACTION; PERMITTIVITY; POLARIZATION; SYMMETRY BREAKING