Emission Mossbauer study of CMR manganite La0.8Ca0.2MnO3.

I. Anomalous ferromagnetism

Автор(и)

  • Vladimir Chechersky Nath Department of Chemistry, Drexel University, Philadelphia, PA 19104, U.S.A.
  • Amar Nath Nath Department of Chemistry, Drexel University, Philadelphia, PA 19104, U.S.A.
  • Honglyoul Ju Greene Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742, U.S.A.
  • L. Richard Greene Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742, U.S.A.

DOI:

https://doi.org/10.1063/1.593421

Ключові слова:

Анотація

Using 57Co emission Mossbauer technique we present clear evidence that in Ca-doped manganite, the magnetic and paramagnetic phases coexist below ,TC, with the abundance of the latter increasing with temperature. Unlike the regular ferromagnetics, the variation of the hyperfine internal magnetic field Hint with temperature deviates considerably from the Brillouin relation, and exhibits an abrupt drop at TC. These features characterize magnetic transition as the first order one. Non-Brillouin behavior of Hint (T) and the temperature dependence of the shape of the magnetically split sextet indicate the presence of spin fluctuations in this material well below TC .

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Опубліковано

1997-07-10

Як цитувати

(1)
Chechersky, V.; Nath, A.; Ju, H.; Richard, L.

Emission Mossbauer Study of CMR Manganite La0.8Ca0.2MnO3.

I. Anomalous Ferromagnetism. Fiz. Nizk. Temp. 1997, 23, 727-731.

Номер

Том 23 № 7 (1997)

Розділ

Низькотемпературний магнетизм