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Far infrared spectroscopy on the three-dimensional dilute antiferromagnet FexZn1–xF2
Fourier-transform infrared spectroscopy measurements have been performed on the three-dimensional dilute antiferromagnet FexZn1–xF2 with x = 0.99–0.58 in the far infrared (FIR) region. The F...
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Magnetic field dependence of spin-glass freezing temperature in a diluted antiferromagnet Mn0.55Mg0.45TiO3
In order to examine magnetic properties of a spin-glass Mn0.55Mg0.45TiO3 under magnetic fields, dc magnetization, ac susceptibility, muon spin relaxation (µSR), and neutron scattering measuremen...

Studies of the three-dimensional frustrated antiferromagnetic ZnCr2O4

J. Appl. Phys. 89, 7050 (2001); doi:10.1063/1.1358340

Issue Date: 1 June 2001

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H. Martinho, N. O. Moreno, J. A. Sanjurjo, and C. Rettori
Instituto de Física "Gleb Wataghin," UNICAMP, 13083-970 Campinas-SP, Brazil

A. J. García-Adeva and D. L. Huber
Physics Department, University of Wisconsin-Madison, 1150 University Ave., Madison, Wisconsin 53706

S. B. Oseroff
San Diego State University, San Diego, California 92182

W. Ratcliff II and S.-W. Cheong
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854

P. G. Pagliuso and J. L. Sarrao
Los Alamos National Laboratory, Los Alamos, New Mexico 87545

G. B. Martins
National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306
Results of studies of the susceptibility, magnetic specific heat, and electron paramagnetic resonance spectrum of the geometrically frustrated antiferromagnetic ZnCr2O4 are presented. The temperature dependence of the susceptibility and the specific heat are in good agreement with the predictions of the quantum tetrahedral mean field model for exchange-coupled spin-3/2 ions on a pyrochlore lattice. The origin of the anomalous behavior of the resonance intensity below 90 K is discussed. ©2001 American Institute of Physics.
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KEYWORDS and PACS

Keywords
PACS
  • 75.50.Ee
    Magnetic properties and materials Studies of specific magnetic materials Antiferromagnetics
  • 75.40.Cx
    Magnetic properties and materials Critical-point effects, specific heats, short-range order Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
  • 71.18.+y
    Electronic structure of bulk materials Fermi surface: calculations and measurements; effective mass, g factor
  • 75.30.Et
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Exchange and superexchange interactions
  • 75.30.Cr
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Saturation moments and magnetic susceptibilities
  • 76.30.Fc
    Magnetic resonances and relaxations in condensed matter, Mössbauer effect Electron paramagnetic resonance and relaxation Iron group (3d) ions and impurities (Ti–Cu)
  • YEAR: 2001

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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REFERENCES (11)
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