Magnetically tunable rf wave absorption in polycrystalline La0.67Ba0.33MnO3

Details Magnetically tunable rf wave absorption in polycrystalline La0.67Ba0.33MnO3 Magnetically tunable rf wave absorption in polycrystalline La0.67Ba0.33MnO3

2008-12-30

arxiv.org/abs/0812.5000v1

Physics

Condensed Matter

Materials Science

12 pages, 5 figures

Scientific paper

10.1063/1.3116119

We investigated temperature and magnetic field dependent radio-frequency electromagnetic absorption in La0.67Ba0.33MnO3 by monitoring changes in resonance frequency (fr) and current (II) through a LC resonant circuit powered by an integrated chip oscillator. The ferromagnetic to paramagnetic transition at Tc in zero external magnetic field is accompanied by an abrupt increase in fr and I and they are tunable by small external magnetic field. We observed fractional changes as much as 46% in delfr/fr and 23% in delI/I around Tc under H = 0.1 T that can be exploited for low magnetic field sensors and other applications.

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