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- Title
Relaxation of magnetic clusters in Sr and Fe doped cobaltate perovskites.
- Authors
Németh, Z.; Klencsár, Z.; Kuzmann, E.; Homonnay, Z.; Vértes, A.; Greneche, J. M.; Bódogh, M.
- Abstract
Mössbauer study of La1 − x Sr x 57Fe0.025Co0.975O3 (0.15 ≤ x ≤ 0.25) perovskites below their magnetic ordering temperature shows cooperative electronic and magnetic phase separation for all compositions investigated. It is shown that the increase of the Sr concentration results in a transition from superparamagnetism to long range ferromagnetism of Co clusters between x = 0.18 and 0.2. In-field Mössbauer measurements revealed the existence of frustrated magnetic interactions at x = 0.22.
- Subjects
TEMPERATURE; PARAMAGNETISM; MOSSBAUER effect; MAGNETISM; COBALT
- Publication
Hyperfine Interactions, 2008, Vol 184, Issue 1-3, p63
- ISSN
0304-3843
- Publication type
Article
- DOI
10.1007/s10751-008-9767-9