Giant magnetoresistance at microwave frequencies

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

Research output: Contribution to journalLetter

49 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

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microwave frequencies
microwaves
magnetization
microwave absorption
ceramics
electrical resistivity

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Domínguez, M., Bhagat, S. M., Lofland, S. E., Ramachandran, J. S., Xiong, G. C., Ju, H., ... Greene, R. L. (1995). Giant magnetoresistance at microwave frequencies. EPL, 32(4), 349-353. https://doi.org/10.1209/0295-5075/32/4/011
Domínguez, M. ; Bhagat, S. M. ; Lofland, S. E. ; Ramachandran, J. S. ; Xiong, G. C. ; Ju, Honglyoul ; Venkatesan, T. ; Greene, R. L. / Giant magnetoresistance at microwave frequencies. In: EPL. 1995 ; Vol. 32, No. 4. pp. 349-353.
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Domínguez, M, Bhagat, SM, Lofland, SE, Ramachandran, JS, Xiong, GC, Ju, H, Venkatesan, T & Greene, RL 1995, 'Giant magnetoresistance at microwave frequencies', EPL, vol. 32, no. 4, pp. 349-353. https://doi.org/10.1209/0295-5075/32/4/011

Giant magnetoresistance at microwave frequencies. / Domínguez, M.; Bhagat, S. M.; Lofland, S. E.; Ramachandran, J. S.; Xiong, G. C.; Ju, Honglyoul; Venkatesan, T.; Greene, R. L.

In: EPL, Vol. 32, No. 4, 01.11.1995, p. 349-353.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Giant magnetoresistance at microwave frequencies

AU - Domínguez, M.

AU - Bhagat, S. M.

AU - Lofland, S. E.

AU - Ramachandran, J. S.

AU - Xiong, G. C.

AU - Ju, Honglyoul

AU - Venkatesan, T.

AU - Greene, R. L.

PY - 1995/11/1

Y1 - 1995/11/1

N2 - 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.

AB - 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.

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JF - Europhysics Letters

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Domínguez M, Bhagat SM, Lofland SE, Ramachandran JS, Xiong GC, Ju H et al. Giant magnetoresistance at microwave frequencies. EPL. 1995 Nov 1;32(4):349-353. https://doi.org/10.1209/0295-5075/32/4/011