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Title: Large dielectric permittivity and possible correlation between magnetic and dielectric properties in bulk BaFeO{sub 3−δ}

We report structural, magnetic, and dielectric properties of oxygen deficient hexagonal BaFeO{sub 3−δ}. A large dielectric permittivity comparable to that of other semiconducting oxides is observed in BaFeO{sub 3−δ}. Magnetization measurements indicate magnetic inhomogeneity and the system shows a paramagnetic to antiferromagnetic transition at ∼160 K. Remarkably, the temperature, at which paramagnetic to antiferromagnetic transition occurs, around this temperature, a huge drop in the dissipation factor takes place and resistivity shoots up; this indicates the possible correlation among magnetic and dielectric properties. First principle simulations reveal that some of these behaviors may be explained in terms of many body electron correlation effect in the presence of oxygen vacancy present in BaFeO{sub 3−δ} indicating its importance in both fundamental science as well as in applications.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Indus Synchrotrons Utilization Division, Raja Ramanna Center for Advanced Technology, Indore 13 (India)
  2. Discipline of Physics and MSE, Indian Institute of Technology, Indore 17 (India)
  3. Laser Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 13 (India)
  4. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 05 (India)
  5. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 17 (India)
Publication Date:
OSTI Identifier:
22311213
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 4; 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; ANTIFERROMAGNETISM; BARIUM COMPOUNDS; COMPUTERIZED SIMULATION; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; DISSIPATION FACTOR; ELECTRON CORRELATION; FERRITES; MAGNETIC PROPERTIES; MAGNETIZATION; PARAMAGNETISM; PERMITTIVITY; TEMPERATURE RANGE 0065-0273 K; TRANSITION TEMPERATURE; VACANCIES