High Frequency Behavior of La0.7Sr0.3MnO3 with Giant Magnetoimpedance Effect

Jifan Hu; Hongwei Qin; Juan Chen; Zhenxi Wang

doi:10.2320/matertrans.43.523

High Frequency Behavior of La_0.7Sr_0.3MnO₃ with Giant Magnetoimpedance Effect

Jifan Hu, Hongwei Qin, Juan Chen, Zhenxi Wang

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Keywords: giant magnetoimpedance effect, magnetoresistance, high frequency behavior, domain wall relaxation, domain wall resonance, nature resonance

JOURNAL FREE ACCESS

2002 Volume 43 Issue 3 Pages 523-525

DOI https://doi.org/10.2320/matertrans.43.523

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Abstract

In the present work it has been found that the room temperature impedance of La_0.7Sr_0.3MnO₃ increases with increasing ac frequency from 7.38 to 110 MHz. The room temperature magnetoresistance ratio (R(0)–R(H))⁄R(0) for La_0.7Sr_0.3MnO₃ can reach 31.4% with H=4.92×10⁵ A/m at a frequency of 68.27 MHz. The frequency dependence of magnetoimpedance, as well as magnetoreactance and magnetoresistance, were investigated in detail.

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