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

被引：14
作者：
Naik, V. B.
Mahendiran, R. [1 ]
机构：
[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 14期
基金：
新加坡国家研究基金会;
关键词：
barium compounds; Curie temperature; ferromagnetic materials; ferromagnetic-paramagnetic transitions; lanthanum compounds; paramagnetic materials; radiofrequency spectra; TUNNEL-DIODE OSCILLATOR; GIANT MAGNETORESISTANCE; TEMPERATURES; MANGANITES; IMPEDANCE; PARTICLE;
D O I：
10.1063/1.3116119
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigated temperature and magnetic field dependent radio-frequency electromagnetic absorption in La0.67Ba0.33MnO3 by monitoring changes in resonance frequency (f(r)) and current (I) through a LC resonant circuit powered by an integrated chip oscillator. The ferromagnetic to paramagnetic transition at T-C in zero magnetic field is accompanied by an abrupt increase in f(r) and I and they are tunable by small external magnetic field. We observed fractional changes as much as 46% in Delta f(r)/f(r) and 23% in Delta I/I around T-C under mu H-0=0.1 T that can be exploited for low-magnetic field sensors and other applications.
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页数：3
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