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MA: Magnetismus

MA 5: Spin-Structures and Magnetic Phase Transitions I

MA 5.4: Vortrag

Montag, 27. März 2006, 11:00–11:15, HSZ 403

Elastomagnetic coupling of the ferrimagnetic semiconductor FeCr₂S₄ studied with surface acoustic waves — •Claus Müller¹, Veaceslav Zestrea², Vladimir Tsurkan^1,2, Siegfried Horn¹, Reinhard Tidecks¹, and Achim Wixforth¹ — ¹Institut für Physik, Universität Augsburg, D-86159, Augsburg, Germany — ²Institute of Applied Physics, Academy of Sciences of Moldova, MD-2028, Chisinau, R. Moldova

A thin single crystalline plate of the ferrimagnetic semiconductor FeCr₂S₄ was attached to the sound path of a surface acoustic wave (SAW) delay line. We investigated the attenuation and frequency tracking of the probing SAW in the temperature range from 4.2K to 200K. The same anomalies as in low-field magnetization measurements were seen. Since there is no coincidence of these anomalies with changes of the sheet conductance, they are related to structural transformations.