skip to main content

Title: Exchange integrals in magnetoelectric hexagonal ferrite (SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19}): A density functional study

The exchange integrals in magnetoelectric hexagonal ferrite SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19} have been calculated by using density functional theory. To get 10 inter-sublattice and 3 intra-sublattice exchange integrals, the electronic structures and total energies of 20 spin arrangements have been calculated with General Gradient Approximation (GGA) + U method. The dependence of exchange integrals on U has been studied. The comparison between the exchange integrals in SrFe{sub 12}O{sub 19} and those in SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19} shows that substitution of Co and Ti decreases the most interactions involving the 12‚ÄČk sites. The investigation based on our exchange integrals indicates that magnetic interaction between R and S blocks reduces significantly in SrCo{sub 2}Ti{sub 2}Fe{sub 8}O{sub 19}.
Authors:
 [1] ;  [2] ; ;  [3]
  1. School of Physics, Nankai University, Tianjin 300071 (China)
  2. Department of Physics, Tsinghua University, Beijing 100084 (China)
  3. College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071 (China)
Publication Date:
OSTI Identifier:
22273798
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; 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; APPROXIMATIONS; COBALT COMPOUNDS; COMPARATIVE EVALUATIONS; DENSITY FUNCTIONAL METHOD; ELECTRICAL PROPERTIES; ELECTRONIC STRUCTURE; FERRITES; HEXAGONAL LATTICES; INTEGRALS; MAGNETIC PROPERTIES; SPIN; STRONTIUM COMPOUNDS; TITANIUM COMPOUNDS