JETP Letters

, Volume 85, Issue 1, pp 51–54 | Cite as

Determination of the region of existence of ferromagnetic nanostructures in the paraphase of La1−xBaxMnO3 by the EPR method

  • R. M. Eremina
  • I. V. Yatsyk
  • Ya. M. Mukovskiĭ
  • H. -A. Krug von Nidda
  • A. Loidl
Condensed Matter

Abstract

In the paraphase of a number of La1−xBaxMnO3 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 Ha1 = 2500 Oe and Ha2 = −700 Oe.

PACS numbers

75.47.Lx 76.30.-v 

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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • R. M. Eremina
    • 1
  • I. V. Yatsyk
    • 1
  • Ya. M. Mukovskiĭ
    • 2
  • H. -A. Krug von Nidda
    • 3
  • A. Loidl
    • 3
  1. 1.Kazan Physicotechnical Institute, Kazan Scientific CenterRussian Academy of SciencesKazanRussia
  2. 2.Moscow State Institute of Steel and AlloysTechnological UniversityMoscowRussia
  3. 3.Experimentalphysik VUniversität AugsburgAugsburgGermany

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