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Temperature dependence of free energy barriers in a Cu(7 at. % Mn) spin glass
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
1994 (English)In: Physica B: Condensed Matter, ISSN 0921-4526, Vol. 194-196, no 1, 305-306 p.Article in journal (Refereed) Published
Abstract [en]

Time dependent zero-field-cooled magnetisation measurements have been performed in order to determine the temperature dependence of the free energy barriers, B(T), in the spin glass Cu(7 at% Mn). The results have been analysed using the temperature dependence of the free energy barriers predicted in the droplet model, B( T)∝Δ( T) Lψ where L is the size of the droplet. It is found that as T→0 K, Δ (T)→constant, yielding activated dynamics in agreement with the droplet model. As T→ Tg, Δ (T) decreases but stays finite at Tg. This result is in contrast to the current droplet model where Δ (T)→0 when T→ Tg.

Place, publisher, year, edition, pages
1994. Vol. 194-196, no 1, 305-306 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-1778DOI: 10.1016/0921-4526(94)90482-0Local ID: 484OAI: oai:DiVA.org:miun-1778DiVA: diva2:26810
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved

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