Study on magnetic properties of nanocrystalline La-, Nd-, or Gd-substituted Ni–Mn ferrite at low temperatures
The effects of rare-earth ions with different radii and magnetic moments on the magnetic properties of Ni–Mn ferrite are investigated. X-ray diffraction pattern has shown the presence of cubic structure of spinel ferrite for all samples. The values of M s and H c are decreasing with increasing of te...
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Published in | Journal of magnetism and magnetic materials Vol. 305; no. 1; pp. 91 - 94 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.10.2006
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | The effects of rare-earth ions with different radii and magnetic moments on the magnetic properties of Ni–Mn ferrite are investigated. X-ray diffraction pattern has shown the presence of cubic structure of spinel ferrite for all samples. The values of
M
s and
H
c are decreasing with increasing of testing temperatures for all samples. The
H
c value of Ni
0.7Mn
0.3La
0.1Fe
1.9O
4 reaches 1082
Oe at 2
K. Mössbauer spectra tested at 273
K indicate the presence of superparamagnetism for samples calcined at 873
K. |
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ISSN: | 0304-8853 |
DOI: | 10.1016/j.jmmm.2005.11.043 |