Crystal structure and magnetic anisotropy of ludwigite Co{sub 2}FeO{sub 2}BO{sub 3}
- Siberian Federal University (Russian Federation)
- Russian Academy of Sciences, Kirenskii Institute of Physics, Siberian Branch (Russian Federation)
- CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Instituto de Ciencia de Materiales de Aragon (Spain)
Co{sub 3}O{sub 2}BO{sub 3} and Co{sub 2}FeO{sub 2}BO{sub 3} single crystals with a ludwigite structure are fabricated, and their crystal structure and magnetic properties are studied in detail. Substituted ludwigite Co{sub 2}FeO{sub 2}BO{sub 3} undergoes two-stage magnetic ordering at the temperatures characteristic of Fe{sub 3}O{sub 2}BO{sub 3} (T{sub N1} Almost-Equal-To 110 K, T{sub N2} Almost-Equal-To 70 K) rather than Co{sub 3}O{sub 2}BO{sub 3} (T{sub N} = 42 K). This effect is explained in terms of preferred occupation of nonequivalent crystallographic positions by iron, which was detected by X-ray diffraction. Both materials exhibit a pronounced uniaxial magnetic anisotropy. Crystallographic direction b is an easy magnetization axis. Upon iron substitution, the cobalt ludwigite acquires a very high magnetic hardness.
- OSTI ID:
- 22027960
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 113, Issue 6; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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