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Author (up) R. H. Rodriguez, L. Tosi, M. Menghini, H. Pastoriza and C. A. Balseiro
Title Multiple First Order Transitions in Cr Thin Films Type Journal Article
Year 2014 Publication Journal of Physics: Conference Series Abbreviated Journal
Volume 568 Issue 4 Pages 042031
Keywords
Abstract The incommensurate spin density wave (SDW) in metalic Cr forms below T N = 311K and is characterized by a temperature dependent wave-vector Q along the direction. The wavelength varies from 78 Ã… at 300 K to 60 Ã… at 150 K. In thin films, the Q-vector orients perpendicular to the film surface and the SDW is forced to satisfy boundary conditions. As a consequence of the confinement, the SDW wavelength is quantized in a set of available modes, each one having n nodes. As the temperature decreases the wavelength does not follow a continuous bulk-type variation but jumps between different allowed values. These jumps occur at certain determined temperatures T n as first order type transitions which are accompanied with a decrease ( n to n + 1 nodes) or an increase ( n + 1 to n nodes) of the resistance. In this work, we present transport measurements on Cr thin films showing hysteretic behavior in the resistance as a function of temperature in cooling-warming cycles. The hysteresis loops are thickness dependent and present structures which we associate with the possible multiple transitions that may occur as temperature is swept.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1742-6596 ISBN Medium
Area Expedition Conference Low Temperature Physics XXVII
Notes Approved no
Call Number BT @ hernan @ Serial 702
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