Low-Energy Nuclear Spin Excitations in NdMg3 and NdCo2

Autor: Chatterji, T., Schneider, G. J., Galera, R. M.
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Physical review / B 78(1), 012411 (2008). doi:10.1103/PhysRevB.78.012411
DOI: 10.1103/PhysRevB.78.012411
Popis: We investigated the low-energy excitations in NdMg3 and NdCo2 in the mu eV range by a backscattering neutron spectrometer. The energy scans on polycrystalline NdMg3 and NdCo2 samples revealed inelastic peaks at E=1.70 +/- 0.01 mu eV and 3.37 +/- 0.01 mu eV, respectively, at T = 2 K on both energy gain and loss sides. The inelastic peaks move gradually toward lower energy with increasing temperature and finally merge with the elastic peak at the electronic magnetic ordering temperature T-N approximate to 6 K and T-C approximate to 100 K, respectively. We interpret the inelastic peaks to be due to the transition between hyperfine-split nuclear levels of the Nd-143 and Nd-145 isotopes with spin I = 7/2.
Databáze: OpenAIRE