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Title: Magnetic study of M-type doped barium hexaferrite nanocrystalline particles

Co-Ti and Ru-Ti substituted barium ferrite nanocrystalline particles BaFe{sub 12−2x}Co{sub x}Ti{sub x}O{sub 19} with (0≤x≤1) and BaFe{sub 12−2x}Ru{sub x}Ti{sub x}O{sub 19} with (0≤x≤0.6) were prepared by ball milling method, and their magnetic properties and their temperature dependencies were studied. The zero-field-cooled (ZFC) and field-cooled (FC) processes were recorded at low magnetic fields and the ZFC curves displayed a broad peak at a temperature T{sub M}. In all samples under investigation, a clear irreversibility between the ZFC and FC curves was observed below room temperature, and this irreversibility disappeared above room temperature. These results were discussed within the framework of random particle assembly model and associated with the magnetic domain wall motion. The resistivity data showed some kind of a transition from insulator to perfect insulator around T{sub M}. At 2 K, the saturation magnetization slightly decreased and the coercivity dropped dramatically with increasing the Co-Ti concentration x. With Ru-Ti substitution, the saturation magnetization showed small variations, while the coercivity decreased monotonically, recording a reduction of about 73% at x = 0.6. These results were discussed in light of the single ion anisotropy model and the cationic distributions based on previously reported neutron diffraction data for the CoTi substituted system, and the results ofmore » our Mössbauer spectroscopy data for the RuTi substituted system.« less
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ; ; ;  [6] ;  [7]
  1. Physics Department, Kuwait University, 13060 Safat (Kuwait)
  2. (Jordan)
  3. Physics Department, Al al-Bayt University, Mafraq (Jordan)
  4. Physics Department, The University of Jordan, Amman (Jordan)
  5. Physics Department, The Hashemite University, 13115 Zarqa (Jordan)
  6. Helmholtz Zentrum für Matearialien und Energie, 14109 Berlin (Germany)
  7. Physics Department, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
Publication Date:
OSTI Identifier:
22267789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABUNDANCE; ANISOTROPY; BARIUM; BARIUM COMPOUNDS; COERCIVE FORCE; CONCENTRATION RATIO; CRYSTALS; DOPED MATERIALS; FERRITES; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; MILLING; NANOSTRUCTURES; NEUTRON DIFFRACTION