| Issue |
EPL
Volume 82, Number 3, May 2008
|
|
|---|---|---|
| Article Number | 37005 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/82/37005 | |
| Published online | 22 April 2008 | |
Microwave detection of magnetic phase avalanches in La0.225Pr0.4Ca0.375MnO3 manganites
1
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
Received:
9
January
2008
Accepted:
13
March
2008
Recent low-temperature studies on La
PryCa3/8MnO3 (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
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