Abstract
In the paraphase of a number of La1−x BaxMnO3 single crystals with 0.1 ≤ x ≤ 0.2 below 340 K, signals of the ferromagnetic resonance are observed, which indicates the presence of magnetically ordered nanoscopic objects (ferrons). The region of the existence of ferrons on the Ba density-temperature phase diagram has an approximate triangular shape, which is characteristic of the Griffiths phase. Investigations of the angular and frequency dependences of the position of the ferromagnetic resonance line indicate that the nanostructures have a spherical shape. The parameters of their magnetic anisotropy are found to be H a1 = 2500 Oe and H a2 = −700 Oe.
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Original Russian Text © R.M. Eremina, I.V. Yatsyk, Ya.M. Mukovskiĭ, H.-A. Krug von Nidda, A. Loidl, 2007, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 85, No. 1, pp. 57–60.
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Eremina, R.M., Yatsyk, I.V., Mukovskiĭ, Y.M. et al. Determination of the region of existence of ferromagnetic nanostructures in the paraphase of La1−x BaxMnO3 by the EPR method. Jetp Lett. 85, 51–54 (2007). https://doi.org/10.1134/S0021364007010109
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DOI: https://doi.org/10.1134/S0021364007010109