Study of the spin dynamics in an iron cluster nanomagnet by means of Mössbauer spectroscopy

Autor:	Dante Gatteschi, Andrea Caneschi, L. Cianchi, F. Del Giallo, F. Pieralli, Gabriele Spina, P. Moretti
Rok vydání:	1999
Předmět:	Magnetic structure Condensed matter physics Chemistry Relaxation (NMR) Exchange interaction Atom General Materials Science Ising model Condensed Matter Physics Ground state Spin (physics) Molecular physics Nanomagnet
Zdroj:	Journal of Physics: Condensed Matter. 11:3395-3403
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/11/16/019
Popis:	The spin dynamics of a cluster of four iron (III) ions characterized by a spin ground state of 5 and Ising anisotropy has been investigated by means of Mossbauer spectroscopy from 10 to 80 K. For , spectra display a partially relaxed magnetic structure, while for higher temperatures, spectra are wholly relaxed. The trend of the probabilities of transition per unit time derived from the spectrum fittings is typical of an Orbach process or of a coupling with vibration modes in a narrow frequency range. According to an order-of-magnitude estimate, the relaxation mechanism should consist of modulations of the exchange interaction due to atom vibrations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f303f276febed96ffaed485ef92972a https://doi.org/10.1088/0953-8984/11/16/019 Zobrazit plný text záznamu