Volume 82, Number 3, May 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||22 April 2008|
Microwave detection of magnetic phase avalanches in La0.225Pr0.4Ca0.375MnO3 manganites
Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona - Avinguda. Diagonal 647, Planta 4, Edifici nou, 08028 Barcelona, Spain, EU
2 Department of Physics, University of Florida - Gainesville, FL 32611, USA
Accepted: 13 March 2008
Recent low-temperature studies on LaPryCa3/8MnO3 (y=3/8) have shown that the occurrence of the first-order transition in these family of perovskites manifests itself in the form of magnetic and electric avalanches. In this paper we report on the detection of such avalanches performing microwave experiments with coaxial resonators (low frequency ~ 3 GHz) and cavities (high frequency ~ 50 GHz) at different temperatures and magnetic fields. Short measuring times enabled us to detect the rapid variation in the energy absorption and/or cavity perturbation of the microwaves due to the occurrence of these phase transitions.
PACS: 75.10.-b – General theory and models of magnetic ordering / 78.70.Gq – Microwave and radio-frequency interactions / 45.70.Ht – Avalanches
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.