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Title: Decoupled scenario between the conductive carriers and the ferromagnetism in epitaxial Zn{sub 0.85−x}Mg{sub x}Co{sub 0.15}O thin films

A series of Zn{sub 0.85−x}Mg{sub x}Co{sub 0.15}O (0 ≤ x ≤ 0.3) thin films were fabricated by plasma-assisted molecular-beam epitaxy to investigate the correlation between the electrical transport properties and the ferromagnetism. It is observed that the saturation magnetization remains almost unchanged even though the resistivity of the Zn{sub 0.85−x}Mg{sub x}Co{sub 0.15}O films dramatically increases more than 6 orders with increasing Mg concentration. Moreover, the absence of detectable anomalous Hall effects and very small magnetoresistance in the films reveal the absence of spin polarization of conductive carriers and very weak spin-dependent scattering or tunneling processes. All these results suggest that the conductive carriers are decoupled with the ferromagnetism in the Zn{sub 0.85−x}Mg{sub x}Co{sub 0.15}O films.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [1] ;  [2]
  1. National Key Laboratory of Crystal Materials, School of Physics, Shandong University, Jinan, Shandong 250100 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22310889
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 7; 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; CARRIERS; COBALT COMPOUNDS; CORRELATIONS; ELECTRIC CONDUCTIVITY; FERROMAGNETISM; MAGNESIUM COMPOUNDS; MAGNETIZATION; MAGNETORESISTANCE; MOLECULAR BEAM EPITAXY; OXYGEN COMPOUNDS; PLASMA; SATURATION; SCATTERING; SPIN ORIENTATION; THIN FILMS; TUNNEL EFFECT; ZINC COMPOUNDS