Magnetic Properties of La<sub>0.81</sub>Sr<sub>0.19</sub>Mn<sub>0.9</sub>Fe<sub>0.1-<i>x</i></sub>Zn<i><sub>x</sub></i>O<sub>3</sub> (<i>x</i>=0, <i>x</i>=0<i>.</i>05)

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Eremina R. M., Yatsyk I., Seidov Z. Y., Vagizov F. G., Shustov V. A., Badelin A. G., ...daha çox

APPLIED MAGNETIC RESONANCE, vol.54, no.4-5, pp.449-461, 2023 (SCI-Expanded) identifier identifier

  • Nəşrin Növü: Article / Article
  • Cild: 54 Say: 4-5
  • Nəşr tarixi: 2023
  • Doi nömrəsi: 10.1007/s00723-022-01510-x
  • jurnalın adı: APPLIED MAGNETIC RESONANCE
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Səhifə sayı: pp.449-461
  • Adres: Bəli

Qısa məlumat

Magnetic properties of polycrystalline La0.81Sr0.19Mn0.9Fe0.1-xZnxO3 (x = 0, 0.05) have been investigated by means of electron spin resonance, magnetic susceptibility, and Mossbauer measurements. Both samples show a clear ferromagnetic transition. The Curie temperature T-C decreases on increasing Fe content (x = 0.05-T-C = 222 K; x = 0-T-C = 148 K). Mossbauer studies indicate that Fe in these compounds is in the trivalent high-spin state. The temperature evolution of the Mossbauer spectra at low temperatures (T < T-C) is typical for ferromagnetic clusters with a wide distribution in size and magnetic correlation length. The inverse susceptibility of all the samples deviates from the Curie-Weiss law above T-C, indicating the presence of fluctuations on approaching magnetic order. An anomalous downturn of the inverse susceptibility for x = 0.05 significantly above T-C and the concomitant observation of ferromagnetic resonance signals coexisting with the paramagnetic resonance up to approximately room temperature, is caused by a Griffiths-like behavior. This regime is characterized by the coexistence of ferromagnetic entities within the globally paramagnetic phase.