Using 57Co emission Mössbauer 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.
|Number of pages||5|
|Journal||Fizika Nizkikh Temperatur (Kharkov)|
|Publication status||Published - 1997|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)