Giant magnetoresistance at microwave frequencies

M. Domínguez, S. M. Bhagat, S. E. Lofland, J. S. Ramachandran, G. C. Xiong, H. L. Ju, T. Venkatesan, R. L. Greene

Research output: Contribution to journalLetterpeer-review

52 Citations (Scopus)

Abstract

We report the first measurement of giant magnetoresistance at 10 GHz in a bulk ceramic sample of Nd0.7Sr0.3MnO3. From the surface resistance data, we deduce that the magnetoresistance, [QμW (0) - QμW (B)]/QμW (0) at 1.2 T, has a peak value of approximately 90% at 215 K. The microwave studies are supplemented by data on low-field (£ 3.5mT) d.c. magnetization and d.c. resistivity. From the magnetization data, we find that Tc = (219 ± 2) K The zero-field microwave loss peaks at Tp = (216 ± 2) K. The field dependence of the microwave absorption suggests that these materials can prove to be extremely useful in designing microwave devices.

Original languageEnglish
Pages (from-to)349-353
Number of pages5
JournalEPL
Volume32
Issue number4
DOIs
Publication statusPublished - 1995 Nov 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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