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Magnetic clusters in ilmenite-hematite solid solutions
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DOI：10.1103/PhysRevB.81.224423.png)
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摘要
En 中文
We report the use of high-field (57)Fe Mossbauer spectroscopy to resolve the magnetic ordering of ilmenite-hematite [xFeTiO(3)-(1-x)Fe(2)O(3)] solid solutions with x > 0.5. We find that nanometer-sized hematite clusters exist within an ilmenite-like matrix. Although both phases are antiferromagnetically ordered, the hematite clusters show ferrimagnetic behavior due to superexchange coupling with Fe(2+) in ilmenite. For ilmenite-rich samples (x = 0.95), the clusters are isolated and superparamagnetic. For more hematite-rich samples with x = 0.80 and x = 0.70, the clusters interact to form a cluster glass.
Keyword:
SPIN-GLASS SYSTEM
NEUTRON-DIFFRACTION
NIO NANOPARTICLES
LOW-TEMPERATURE
MOSSBAUER
(1-X)FETIO3-XFE2O3
ALPHA-FE2O3
DYNAMICS
SERIES
FIELDS
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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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Magnetic dynamics of weakly and strongly interacting hematite nanoparticles.png)
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