skip to main content

Title: Spin and phonon anomalies in epitaxial self-assembled CoFe{sub 2}O{sub 4}-BaTiO{sub 3} multiferroic nanostructures

Temperature dependent magnetic and phonon anomalies in epitaxial self-assembled CoFe{sub 2}O{sub 4} (CFO) rods embedded in BaTiO{sub 3} (BTO) matrix nanostructures were investigated. The temperature dependence of A{sub 1}(2TO) phonon frequency of BTO indicates that the BTO matrix experiences structural transformations. The lattice strain produced during the structural transformations drives spin reorientation in CFO rods, resulting in anomalous changes of magnetization. Through correlating the phonon anomalies with the increase of in-plane spin ordering, we show the spin-phonon coupling induces the softening of A{sub 1g} and A{sub 1}(2TO) phonons. It suggests that spin strongly couples with lattice strain and phonons in this nanostructure.
Authors:
; ;  [1] ; ;  [2] ; ;  [3] ;  [4]
  1. Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta Hsueh Rd., Hsinchu 300, Taiwan (China)
  2. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan (China)
  3. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 31013, Taiwan (China)
  4. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 31040, Taiwan (China)
Publication Date:
OSTI Identifier:
22303866
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; BARIUM COMPOUNDS; COBALT COMPOUNDS; COUPLING; EPITAXY; FERRITES; MAGNETIZATION; NANOSTRUCTURES; PHONONS; SPIN; STRAINS; TEMPERATURE DEPENDENCE; TITANATES; TRANSFORMATIONS