Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz

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

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Abstract

Systematic magnetization and ferromagnetic resonance (FMR) measurements have been performed on thin-film samples of La0.67Ba0.33MnOz (TC∼340 K). It is found from the FMR data that asgrown films show broad lines whose width Γ increases to nearly 1 kOe as T reduced to 77 K. The increase roughly follows the increase in the magnetization suggesting magnetic inhomogeneity as the main cause for the rise in Γ. However, when films were properly annealed in O2, we obtained narrow lines (Γ∼200 Oe at 10 GHz). Γ was effectively independent of temperature and linearly dependent upon microwave frequency, both of which are strong signs that, we have succeeded in obtaining a uniform, homogeneous manganite sample. Having gotten a uniform material, we have measured the intrinsic properties of this system.

Original languageEnglish
Pages (from-to)5166-5168
Number of pages3
JournalJournal of Applied Physics
Volume79
Issue number8 PART 2A
Publication statusPublished - 1996 Apr 15

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ferromagnetic resonance
magnetization
microwave frequencies
inhomogeneity
causes
thin films
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Lofland, S. E., Bhagat, S. M., Ju, H. L., Xiong, G. C., Venkatesan, T., Greene, R. L., & Tyagi, S. (1996). Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz. Journal of Applied Physics, 79(8 PART 2A), 5166-5168.
Lofland, S. E. ; Bhagat, S. M. ; Ju, H. L. ; Xiong, G. C. ; Venkatesan, T. ; Greene, R. L. ; Tyagi, S. / Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz. In: Journal of Applied Physics. 1996 ; Vol. 79, No. 8 PART 2A. pp. 5166-5168.
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Lofland, SE, Bhagat, SM, Ju, HL, Xiong, GC, Venkatesan, T, Greene, RL & Tyagi, S 1996, 'Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz', Journal of Applied Physics, vol. 79, no. 8 PART 2A, pp. 5166-5168.

Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz. / Lofland, S. E.; Bhagat, S. M.; Ju, H. L.; Xiong, G. C.; Venkatesan, T.; Greene, R. L.; Tyagi, S.

In: Journal of Applied Physics, Vol. 79, No. 8 PART 2A, 15.04.1996, p. 5166-5168.

Research output: Contribution to journalArticle

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T1 - Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz

AU - Lofland, S. E.

AU - Bhagat, S. M.

AU - Ju, H. L.

AU - Xiong, G. C.

AU - Venkatesan, T.

AU - Greene, R. L.

AU - Tyagi, S.

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AB - Systematic magnetization and ferromagnetic resonance (FMR) measurements have been performed on thin-film samples of La0.67Ba0.33MnOz (TC∼340 K). It is found from the FMR data that asgrown films show broad lines whose width Γ increases to nearly 1 kOe as T reduced to 77 K. The increase roughly follows the increase in the magnetization suggesting magnetic inhomogeneity as the main cause for the rise in Γ. However, when films were properly annealed in O2, we obtained narrow lines (Γ∼200 Oe at 10 GHz). Γ was effectively independent of temperature and linearly dependent upon microwave frequency, both of which are strong signs that, we have succeeded in obtaining a uniform, homogeneous manganite sample. Having gotten a uniform material, we have measured the intrinsic properties of this system.

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Lofland SE, Bhagat SM, Ju HL, Xiong GC, Venkatesan T, Greene RL et al. Ferromagnetic resonance and intrinsic properties of La0.67Ba0.33MnOz. Journal of Applied Physics. 1996 Apr 15;79(8 PART 2A):5166-5168.