Volume 84, Number 6, December 2008
Article Number 67010
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 12 January 2009
EPL, 84 (2008) 67010
DOI: 10.1209/0295-5075/84/67010

Magneto-optical imaging of magnetic deflagration in Mn12-Acetate

D. Villuendas1, D. Gheorghe2, A. Hernández-Mínguez1, F. Macià1, J. M. Hernandez1, J. Tejada1 and R. J. Wijngaarden2

1   Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona - Avda. Diagonal 647, Planta 4, Edifici Nou, 08028 Barcelona, Spain, EU
2   Faculty of Sciences, Division of Physics and Astronomy, Vrije Universiteit - De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands, EU

received 18 July 2008; accepted in final form 18 November 2008; published December 2008
published online 12 January 2009

For the first time, the morphology and dynamics of spin avalanches in Mn12-Acetate crystals using magneto-optical imaging has been explored. We observe an inhomogeneous relaxation of the magnetization, the spins reversing first at one edge of the crystal and a few milliseconds later at the other end. Our data fit well with the theory of magnetic deflagration, demonstrating that very slow deflagration rates can be obtained, which makes new types of experiments possible.

75.50.Xx - Molecular magnets.
75.60.Jk - Magnetization reversal mechanisms.
85.70.Sq - Magneto-optical devices.

© EPLA 2008