Electron spin resonance and magnetization in perovskite and pyrochlore manganites

M. Tovar, M. T. Causa, G. Ibañez, C. A. Ramos, A. Butera, F. Rivadulla, B. Alascio, S. B. Oseroff, Sang-Wook Cheong, X. Obradors, S. Piñol

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Abstract

We have performed electron spin resonance (ESR) and dc susceptibility, χdc(T), measurements in La0.7Ca0.3MnO 3 perovskite up to 1000 K. This is adequately described in the paramagnetic regime in the constant coupling approximation assuming an effective Heisenberg-like pair interaction. The ESR linewidth is given by ΔH pp(T) = ΔHpp(∞)[C/Tχ(T)]. The ESR intensity follows the T dependence of χdc(T). We conclude that the relaxation mechanism is essentially the same for the whole studied paramagnetic range. The observed behavior reflects the progressive importance of magnetic clustering on approaching Tc. We have found similar T dependence for La0.7Sr0.3MnO3 and La 0.7Pb0.3MnO3 perovskites, and also for the pyrochlore In2Mn2O7.

Original languageEnglish (US)
Pages (from-to)7201-7203
Number of pages3
JournalJournal of Applied Physics
Volume83
Issue number11
DOIs
StatePublished - Jan 1 1998
Externally publishedYes

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electron paramagnetic resonance
magnetization
perovskites
magnetic permeability
approximation
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Tovar, M., Causa, M. T., Ibañez, G., Ramos, C. A., Butera, A., Rivadulla, F., ... Piñol, S. (1998). Electron spin resonance and magnetization in perovskite and pyrochlore manganites. Journal of Applied Physics, 83(11), 7201-7203. https://doi.org/10.1063/1.367632
Tovar, M. ; Causa, M. T. ; Ibañez, G. ; Ramos, C. A. ; Butera, A. ; Rivadulla, F. ; Alascio, B. ; Oseroff, S. B. ; Cheong, Sang-Wook ; Obradors, X. ; Piñol, S. / Electron spin resonance and magnetization in perovskite and pyrochlore manganites. In: Journal of Applied Physics. 1998 ; Vol. 83, No. 11. pp. 7201-7203.
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abstract = "We have performed electron spin resonance (ESR) and dc susceptibility, χdc(T), measurements in La0.7Ca0.3MnO 3 perovskite up to 1000 K. This is adequately described in the paramagnetic regime in the constant coupling approximation assuming an effective Heisenberg-like pair interaction. The ESR linewidth is given by ΔH pp(T) = ΔHpp(∞)[C/Tχ(T)]. The ESR intensity follows the T dependence of χdc(T). We conclude that the relaxation mechanism is essentially the same for the whole studied paramagnetic range. The observed behavior reflects the progressive importance of magnetic clustering on approaching Tc. We have found similar T dependence for La0.7Sr0.3MnO3 and La 0.7Pb0.3MnO3 perovskites, and also for the pyrochlore In2Mn2O7.",
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Tovar, M, Causa, MT, Ibañez, G, Ramos, CA, Butera, A, Rivadulla, F, Alascio, B, Oseroff, SB, Cheong, S-W, Obradors, X & Piñol, S 1998, 'Electron spin resonance and magnetization in perovskite and pyrochlore manganites', Journal of Applied Physics, vol. 83, no. 11, pp. 7201-7203. https://doi.org/10.1063/1.367632

Electron spin resonance and magnetization in perovskite and pyrochlore manganites. / Tovar, M.; Causa, M. T.; Ibañez, G.; Ramos, C. A.; Butera, A.; Rivadulla, F.; Alascio, B.; Oseroff, S. B.; Cheong, Sang-Wook; Obradors, X.; Piñol, S.

In: Journal of Applied Physics, Vol. 83, No. 11, 01.01.1998, p. 7201-7203.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron spin resonance and magnetization in perovskite and pyrochlore manganites

AU - Tovar, M.

AU - Causa, M. T.

AU - Ibañez, G.

AU - Ramos, C. A.

AU - Butera, A.

AU - Rivadulla, F.

AU - Alascio, B.

AU - Oseroff, S. B.

AU - Cheong, Sang-Wook

AU - Obradors, X.

AU - Piñol, S.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - We have performed electron spin resonance (ESR) and dc susceptibility, χdc(T), measurements in La0.7Ca0.3MnO 3 perovskite up to 1000 K. This is adequately described in the paramagnetic regime in the constant coupling approximation assuming an effective Heisenberg-like pair interaction. The ESR linewidth is given by ΔH pp(T) = ΔHpp(∞)[C/Tχ(T)]. The ESR intensity follows the T dependence of χdc(T). We conclude that the relaxation mechanism is essentially the same for the whole studied paramagnetic range. The observed behavior reflects the progressive importance of magnetic clustering on approaching Tc. We have found similar T dependence for La0.7Sr0.3MnO3 and La 0.7Pb0.3MnO3 perovskites, and also for the pyrochlore In2Mn2O7.

AB - We have performed electron spin resonance (ESR) and dc susceptibility, χdc(T), measurements in La0.7Ca0.3MnO 3 perovskite up to 1000 K. This is adequately described in the paramagnetic regime in the constant coupling approximation assuming an effective Heisenberg-like pair interaction. The ESR linewidth is given by ΔH pp(T) = ΔHpp(∞)[C/Tχ(T)]. The ESR intensity follows the T dependence of χdc(T). We conclude that the relaxation mechanism is essentially the same for the whole studied paramagnetic range. The observed behavior reflects the progressive importance of magnetic clustering on approaching Tc. We have found similar T dependence for La0.7Sr0.3MnO3 and La 0.7Pb0.3MnO3 perovskites, and also for the pyrochlore In2Mn2O7.

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Tovar M, Causa MT, Ibañez G, Ramos CA, Butera A, Rivadulla F et al. Electron spin resonance and magnetization in perovskite and pyrochlore manganites. Journal of Applied Physics. 1998 Jan 1;83(11):7201-7203. https://doi.org/10.1063/1.367632