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Title: Relaxor-like dielectric response of spin liquid CuCrO{sub 2}

Broadband dielectric analysis (10{sup −2}-10{sup 7} Hz) of layered triangular lattice CuCrO{sub 2} is performed (123 K - 473 K) and analyzed in connection with recently observed spin frustration in this multiferroic [M. Poienar et al. Phys. Rev. B 81, 104411, (2010); M. Frontzek et al. Phys. Rev. B 84, 094448, (2011)]. Most unexpectedly, this well known delafossite has found to have nontrivial charge degrees of freedom, being characterized by a relaxor-like dielectric relaxation around 375 K with FWHM of ∼100K. The result strongly suggests the existence of intermolecular Coulomb interaction between charge disproportionation induced electric dipoles.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Physics Department, Jadavpur University, Kolkata-700032 (India)
  2. School of Materials Science and Nanotechnology, Jadavpur University, Kolkata-700032 (India)
  3. Physics Department, Jadavpur University, Kolkata-700032, India and School of Materials Science and Nanotechnology, Jadavpur University, Kolkata-700032 (India)
Publication Date:
OSTI Identifier:
22269339
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DEGREES OF FREEDOM; DIELECTRIC MATERIALS; ELECTRIC DIPOLES; INTERACTIONS; LIQUIDS; OXIDATION; RELAXATION; SPIN