Blocking of logarithmic temporal relaxation of magnetic remanence by piezomagnetically induced domains in Fe1−xZnxF2

Autor:	Wolfgang Kleemann, J. Kushauer, Christian Binek
Rok vydání:	1994
Předmět:	Spin glass Materials science Condensed matter physics Magnetometer Surface stress Relaxation (NMR) General Physics and Astronomy law.invention Condensed Matter::Materials Science symbols.namesake Ferrimagnetism Remanence law Faraday effect symbols Ising model
Zdroj:	Journal of Applied Physics. 75:5856-5858
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.355538
Popis:	Faraday rotation and superconducting quantum interference device magnetometry were used to investigate the relaxation of the weak‐field induced remanence, μ, of the random‐field Ising model system Fe1−xZnxF2. The stretched logarithmic decay law, as predicted by Nattermann and Vilfan for the case of compact domains with fractal surfaces, was confirmed for freezing fields of 3≤B≤5 T. Virtually constant remanence, μ, was found at low fields, 0.0002≤B≤1.5 T. This ferrimagnetic moment is due to the piezomagnetic effect acting on random‐stress induced immobile domains. Chemical etching, which removes surface stress originating from the sample preparation, proves to decrease the remanence by about 50%, part of which is restored after renewed optical polishing.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b116bc313843cacc44ceb028e0eee3e https://doi.org/10.1063/1.355538 Zobrazit plný text záznamu