skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Structural, magnetic, and Mössbauer spectroscopy of Cu substituted M-type hexaferrites

Abstract

Highlights: • Single BaM hexaferrite structural phases with Cu substations were prepared. • The magnetocrystalline anisotropy decreased with Cu substitution. • The coercivity was significantly modified while the magnetization remained high. • Hexaferrites with 0.2–0.4 Cu possess properties suitable for magnetic recording. • Ionic distributions from structural refinement agreed with Mössbauer spectroscopy. - Abstract: BaFe{sub 12−x}Cu{sub x}O{sub 19} hexaferrites were prepared using ball milling and sintering at 1100 °C. Refinement of the X-ray diffraction patterns was carried out to determine the structural parameters and the ionic distribution over the crystallographic sites. The preferential site occupation and valence state of Cu was consistent with the results obtained from the analysis of Mössbauer spectra. Further, the magnetic parameters of the samples were discussed in light of the structural and Mössbauer analyses. The magnetic phase transition temperature was found to decrease with the level of Cu substitution, in accordance with the reduction of the superexchange interactions. Further, the magnetic softening of the hexaferrite and the significant reduction in magnetocrystalline anisotropy with Cu substitution was consistent with the ionic distribution in the lattice. This study clearly demonstrated the feasibility of using a simple method to fabricate hexaferrites with a modified coercivity, while maintain themore » saturation magnetization high enough for practical applications.« less

Authors:
 [1];  [1];  [2];  [3];  [1]
  1. Physics Department, The University of Jordan, Amman 11942 (Jordan)
  2. Physics Department, Al al-Bayt University, Mafraq 13040 (Jordan)
  3. Physics Department, Yarmouk University, Irbid 21163 (Jordan)
Publication Date:
OSTI Identifier:
22581423
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 74; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; ANISOTROPY; BARIUM COMPOUNDS; CERAMICS; COERCIVE FORCE; COPPER; COPPER COMPOUNDS; FERRATES; MAGNETIC PROPERTIES; MAGNETIZATION; PHASE TRANSFORMATIONS; SINTERING; TRANSITION TEMPERATURE; VALENCE; X-RAY DIFFRACTION

Citation Formats

Awadallah, Ahmad, Mahmood, Sami H., E-mail: s.mahmood@ju.edu.jo, Maswadeh, Yazan, Bsoul, Ibrahim, Awawdeh, Mufeed, Mohaidat, Qassem I., E-mail: q.muhaidat@yu.edu.jo, and Juwhari, Hassan. Structural, magnetic, and Mössbauer spectroscopy of Cu substituted M-type hexaferrites. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2015.10.034.
Awadallah, Ahmad, Mahmood, Sami H., E-mail: s.mahmood@ju.edu.jo, Maswadeh, Yazan, Bsoul, Ibrahim, Awawdeh, Mufeed, Mohaidat, Qassem I., E-mail: q.muhaidat@yu.edu.jo, & Juwhari, Hassan. Structural, magnetic, and Mössbauer spectroscopy of Cu substituted M-type hexaferrites. United States. doi:10.1016/J.MATERRESBULL.2015.10.034.
Awadallah, Ahmad, Mahmood, Sami H., E-mail: s.mahmood@ju.edu.jo, Maswadeh, Yazan, Bsoul, Ibrahim, Awawdeh, Mufeed, Mohaidat, Qassem I., E-mail: q.muhaidat@yu.edu.jo, and Juwhari, Hassan. Mon . "Structural, magnetic, and Mössbauer spectroscopy of Cu substituted M-type hexaferrites". United States. doi:10.1016/J.MATERRESBULL.2015.10.034.
@article{osti_22581423,
title = {Structural, magnetic, and Mössbauer spectroscopy of Cu substituted M-type hexaferrites},
author = {Awadallah, Ahmad and Mahmood, Sami H., E-mail: s.mahmood@ju.edu.jo and Maswadeh, Yazan and Bsoul, Ibrahim and Awawdeh, Mufeed and Mohaidat, Qassem I., E-mail: q.muhaidat@yu.edu.jo and Juwhari, Hassan},
abstractNote = {Highlights: • Single BaM hexaferrite structural phases with Cu substations were prepared. • The magnetocrystalline anisotropy decreased with Cu substitution. • The coercivity was significantly modified while the magnetization remained high. • Hexaferrites with 0.2–0.4 Cu possess properties suitable for magnetic recording. • Ionic distributions from structural refinement agreed with Mössbauer spectroscopy. - Abstract: BaFe{sub 12−x}Cu{sub x}O{sub 19} hexaferrites were prepared using ball milling and sintering at 1100 °C. Refinement of the X-ray diffraction patterns was carried out to determine the structural parameters and the ionic distribution over the crystallographic sites. The preferential site occupation and valence state of Cu was consistent with the results obtained from the analysis of Mössbauer spectra. Further, the magnetic parameters of the samples were discussed in light of the structural and Mössbauer analyses. The magnetic phase transition temperature was found to decrease with the level of Cu substitution, in accordance with the reduction of the superexchange interactions. Further, the magnetic softening of the hexaferrite and the significant reduction in magnetocrystalline anisotropy with Cu substitution was consistent with the ionic distribution in the lattice. This study clearly demonstrated the feasibility of using a simple method to fabricate hexaferrites with a modified coercivity, while maintain the saturation magnetization high enough for practical applications.},
doi = {10.1016/J.MATERRESBULL.2015.10.034},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 74,
place = {United States},
year = {2016},
month = {2}
}