Abrupt changes in the temperature dependence of the ESR linewidth of La1 − x Ca x MnO3 single crystals

Yatsyk, I. V.; Еремина, Р. М.; Shakirzyanov, M. M.; Mukovskiǐ, Ya. M.; Nidda, H.-A. Krug von; Loidl, A.

doi:10.1134/s0021364008080122

Cited by 8 publications

(2 citation statements)

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“…There are several reports on studies of the temper ature dependence of the EPR spectra of manganites [20][21][22]. In [20], it is found that the EPR linewidth in manganites La 1 -x M x MnO 3 (where M = Ba, Ca) with x > 0.05 increases linearly with increasing tempera ture.…”

Section: Experiments and Discussionmentioning

confidence: 96%

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Properties of La1 − x Sr x Mn0.925Zn0.075O3 (x = 0.075, 0.095, 0.115) ceramics

et al. 2012

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The EPR spectra and conductivity of La 1 -x Sr x Mn 0.925 Zn 0.075 O 3 (x = 0.075, 0.095, 0.115) ceram ics with a crystal structure examined by X ray diffraction have been studied. At x = 0.095, a pronounced mag netic field dependence of the electrical resistivity has been revealed in the temperature range from 190 to 228 K. For samples with x = 0.075 and 0.115, no similar behavior has been observed. The EPR linewidth lin early increases with increasing temperature in the range from 180 to 380 K for all the samples; the slope decreases as the strontium concentration increases.

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Section: Experiments and Discussionmentioning

confidence: 96%

“…In [20], it is found that the EPR linewidth in manganites La 1 -x M x MnO 3 (where M = Ba, Ca) with x > 0.05 increases linearly with increasing tempera ture. It is noted as well that the slope of the tempera ture dependence of the EPR linewidth coincides with that in the samples with the same index of doping.…”

Section: Experiments and Discussionmentioning

confidence: 98%

Properties of La1 − x Sr x Mn0.925Zn0.075O3 (x = 0.075, 0.095, 0.115) ceramics

et al. 2012

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Paramagnetic spin dynamics in the nonhomogeneous crystals of low-doped lanthanum manganites

Auslender

Shames

Rozenberg

et al. 2009

Journal of Applied Physics

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The X-band electron paramagnetic resonance (EPR) technique and the model analysis of the EPR linewidth versus temperature were employed to characterize the dopant distribution in a number of La-manganite crystals, low doped with Ca, Sr, and Ba. Such distribution appears to be inhomogeneous in accordance with the results of previous study of EPR susceptibility. The technological originated competition between the quenching and annealing effects during the cooling of the crystals from the high temperatures seems to be the reason of their inherent inhomogeneity. It depends strongly on the dopant nature and, in the crystal doped with 15% of Ba, the inhomogeneity is small as compared to those in the Ca- and Sr-doped samples. It is emphasized that such chemical disorder influences strongly the crystal structure, magnetic state, and transport of these objects.

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