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Title: Distinctive uniaxial magnetic anisotropy and positive magnetoresistance in (110)-oriented Fe{sub 3}O{sub 4} films

Magnetite (Fe{sub 3}O{sub 4}) films were synthesized on (110)-oriented MgO, MgAl{sub 2}O{sub 4}, and SrTiO{sub 3} substrates for comparative studies of the substrates' effects on magnetic and magnetoresistance properties of the films. For the [-110] direction, the hysteresis loops of the Fe{sub 3}O{sub 4} film on MgAl{sub 2}O{sub 4} exhibited a good squareness with the largest coercivity of ∼1090 Oe, and the ratio of remanent magnetization to saturation magnetization was ∼0.995. For the [001] direction, positive magnetoresistance in weak magnetic fields was most distinct for the (110) SrTiO{sub 3} substrate with the largest lattice mismatch. Positive magnetoresistance in the (110) Fe{sub 3}O{sub 4} films was presumably affected by imperfect atomic arrangements at anti-phase boundaries.
Authors:
; ;  [1]
  1. Department of Physics, Kyungpook National University, Daegu 702-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22402911
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; COERCIVE FORCE; CRYSTAL DEFECTS; FERRITES; HYSTERESIS; IRON OXIDES; MAGNESIUM OXIDES; MAGNETIC FIELDS; MAGNETITE; MAGNETIZATION; MAGNETORESISTANCE; STRONTIUM TITANATES; SUBSTRATES; THIN FILMS