Study of structural, magnetic and electrical properties on Ho-substituted BiFeO 3

Durga Rao, T and Karthik, T and Srinivas, A and Asthana, Saket (2012) Study of structural, magnetic and electrical properties on Ho-substituted BiFeO 3. Solid State Communications, 152 (23). pp. 2071-2077. ISSN 0038-1098

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Abstract

The polycrystalline Bi 1-xHo xFeO 3 (x=0, 0.05, 0.1) compounds were synthesized by conventional solid-state route. Rietveld refinement revealed that all the compounds were stabilized in rhombohedral structure with R3c (IUCr No. 161) space group. Room temperature magnetic measurements revealed that Ho substitution induces ferromagnetism and improves the magnetic properties of BiFeO 3. A competing ferro and anti-ferro magnetic interaction was observed in these compounds. Temperature variation of complex impedance studies revealed that electrical properties are improved with the Ho substitution. The ac conductivity found to obey universal power law and showed the negative temperature coefficient of resistance character. Correlated barrier hopping model (CBH) was employed to explain the frequency and temperature dependence of ac conductivity and the mechanism of transport in the material BFO and Ho substituted BFO. Density of states near Fermi level was calculated by using the ac conductivity data. © 2012 Elsevier Ltd.

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IITH Creators:
IITH CreatorsORCiD
Asthana, Sakethttp://orcid.org/0000-0002-6420-3304
Item Type: Article
Uncontrolled Keywords: A. Multiferroics; D. A.C Conductivity; D. Correlated barrier hopping; D. Electrical impedance; A.C conductivity; Complex impedance; Correlated barrier hopping; Correlated barrier hopping models; Density of state; Electrical impedance; Magnetic and electrical properties; Magnetic interactions; Multiferroics; Negative temperature coefficient of resistances; Polycrystalline; Rhombohedral structures; Room temperature; Solid-state routes; Space Groups; Temperature dependence; Temperature variation; Universal power law
Subjects: Materials Engineering > Materials engineering
Physics > Magnetism
Divisions: Department of Physics
Depositing User: Mr. Siva Shankar K
Date Deposited: 15 Oct 2014 05:59
Last Modified: 29 Aug 2017 10:00
URI: http://raiith.iith.ac.in/id/eprint/450
Publisher URL: https://doi.org/10.1016/j.ssc.2012.08.007
OA policy: http://www.sherpa.ac.uk/romeo/issn/0038-1098/
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