Magnetic Metastability in Natural Hemo-ilmenite Solid Solution (y = 0.83)
- chair: Gehring, A.U. / Mastrogiacomo, G. / Fischer, H. / Weidler, P.G. / Luster J. (2008)
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place:
J. Mag. Mat., 320 (2008), 23, 3307-3312
- Date: 2008
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Gehring, A.U. / Mastrogiacomo, G. / Fischer, H. / Weidler, P.G. / Luster J. (2008): „Magnetic Metastability in Natural Hemo-ilmenite Solid Solution (y = 0.83)“. In: J. Mag. Mat., 320 (2008), 23, 3307-3312
Abstract
Natural single crystals of hemo-ilmenite with y approximate to 0.83 are described as solid solution. The single crystals have R (3) over bar structure, which is homogeneous with respect to transmission electron microscopy resolution. Inhomogeneity on a molecular level is documented by ESR spectroscopy, which reveals the generation of Ti-(IV)-enriched Fe-(III) clusters at T <= 20 K.
The ZFC-FC magnetization curves and ac susceptibility measurements indicate inhomogeneity in the magnetic structure of the solid solution at low temperature, which is manifested by spin glass-like properties at about 40 K. These findings provide evidence that chemical heterogeneity on a molecular level and subsequent magnetic disorder enhance the dynamics of the magnetization, i.e. the magnetic metastability in natural hemo-ilmenite solid solution.
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The ZFC-FC magnetization curves and ac susceptibility measurements indicate inhomogeneity in the magnetic structure of the solid solution at low temperature, which is manifested by spin glass-like properties at about 40 K. These findings provide evidence that chemical heterogeneity on a molecular level and subsequent magnetic disorder enhance the dynamics of the magnetization, i.e. the magnetic metastability in natural hemo-ilmenite solid solution.
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