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Title: Negative magnetodielectric effect in CaCu{sub 3}Ti{sub 4}O{sub 12}

Real part of complex relative dielectric value is relatively decreased as large as  ∼5 % from 50 K to 200 K in CaCu{sub 3}Ti{sub 4}O{sub 12}, by applying a 6-T static magnetic field. CaCu{sub 3}Ti{sub 4}O{sub 12} is thus implied primarily by the negative magnetodielectric effect, as a unified dielectric system in which 1-D finite dipole chains of B-site titanium ions, coexist with a collective of polaron-like 3d-electrons of A-site copper ions: the dipole chains are thermally activated for lattice ionic polarization above 50 K, and suppressed by the short-range hop of these quasi-particles, while their long-range movement are for bulk electronic polarization above 151 K.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1] ; ; ; ; ; ;  [4] ; ; ;  [5] ;  [5] ;  [2]
  1. Department of Physics, Nanjing University of Science and Technology, Nanjing 210094 (China)
  2. (China)
  3. (Australia)
  4. Research School of Chemistry, Australian National University, Canberra ACT 0200 (Australia)
  5. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22266109
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 23; Other Information: (c) 2013 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; COPPER IONS; DIELECTRIC MATERIALS; DIPOLES; ELECTRONS; HOLMIUM PHOSPHIDES; MAGNETIC FIELDS; POLARIZATION; QUASI PARTICLES; TITANIUM IONS