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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Yafet-kittel angles in zinc-nickel ferrites
Physical Review, Volume 181, No. 2, Year 1969
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Description
The chemical and magnetic structures of the ZnxNi1-xFe2O4 system have been determined using neutron diffraction for x=0, 0.25, 0.50, and 0.75. The data yield a cation distribution (Znx2+Fe1-x3+) [Ni1-x2+Fe1+x3+]. All the mixed ferrites show a noncollinear, Yafet-Kittel (YK) type of magnetic ordering. The YK angles increase with the zinc content and for a given composition decrease with increasing temperature. For x=0.25 and 0.50, there is a transition from the YK to Néel type of ordering prior to the paramagnetic transition. The Néel region decreases with increasing x; thus, for x=0.75, there is no Néel region, while NiFe2O4 has the Néel type of ordering at all temperatures. The YK angle can be analytically related to x, using the molecular-field theory. The angles predicted in this manner are consistent with a three-sub-lattice molecular-field analysis of the paramagnetic susceptibility data of Néel and Brochet. © 1969 The American Physical Society.
Authors & Co-Authors
Murthy, N. S.Satya
India, Mumbai
Bhabha Atomic Research Centre
Natera, M. G.
India, Mumbai
Bhabha Atomic Research Centre
Philippines, Quezon City
Philippine Nuclear Research Institute
Youssef, S. I.
India, Mumbai
Bhabha Atomic Research Centre
Egypt, Cairo
Egyptian Atomic Energy Authority
Begum, R. J.
India, Mumbai
Bhabha Atomic Research Centre
Srivastava, Chandan
India, Mumbai
Indian Institute of Technology Bombay
Statistics
Citations: 205
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1103/PhysRev.181.969
ISSN:
0031899X