- Tytuł:
- Inelastic Neutron Scattering in γ-Mn(12%Ge) Alloy Above and Below the Néel Temperature
- Autorzy:
-
Jankowska-Kisielińska, J.
Mikke, K.
Hennion, B. - Powiązania:
- https://bibliotekanauki.pl/articles/2013221.pdf
- Data publikacji:
- 2000-03
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.40.Gb
75.30.Ds
75.20.En - Opis:
- The magnetic excitations different from spin waves in the γ-Mn(12%Ge) antiferromagnet are the subject of the present investigation. The inelastic neutron scattering was measured at 4 temperatures above T$\text{}_{N}$. The Lorentzian-type formula for the inelastic neutron scattering cross-section with the spectral width for a hydrodynamic region was used for data analysis. The obtained values of the "stiffness constants" are of the order of 200 meV Å and they depend weakly on temperature in the range of 1.04-1.25T$\text{}_{N}$. The inelastic neutron scattering for energy transfers below and close to the value of the gap energy of the spin wave spectrum was measured at room temperature. The observed intensities can be treated as a sum of intensities of neutrons scattered on spin waves around the magnetic Brillouin zone centre and = those scattered on fluctuations at the zone boundary.
- Źródło:
-
Acta Physica Polonica A; 2000, 97, 3; 559-562
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł