This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/21/12/126003 in citations.
Direct evidence for the Nd magnetic ordering in NdMnO3 from the hyperfine field splitting of Nd nuclear levels
Direct evidence for the Nd magnetic ordering in NdMnO3 from the hyperfine field splitting of Nd nuclear levels
We investigated the low energy excitations in NdMnO(3) in the µeV range by a backscattering neutron spectrometer. The energy spectra on polycrystalline NdMnO(3) samples revealed inelastic peaks at E = 2.15 ± 0.01 µeV at T = 2 K on both energy gain and energy loss sides. The inelastic peaks move grad...
Saved in:
Personal Name(s): | Chatterji, T. |
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Schneider, G. J. / van Eijck, L. / Frick, B. / Bhattacharya, D. | |
Contributing Institute: |
JCNS; JCNS JARA-FIT; JARA-FIT Neutronenstreuung; IFF-5 Streumethoden; IFF-4 |
Published in: | Journal of physics / Condensed matter, 21 (2009) S. 126003-1 - 126003-6 |
Imprint: |
Bristol
IOP Publ.
2009
|
Physical Description: |
126003-1 - 126003-6 |
DOI: |
10.1088/0953-8984/21/12/126003 |
PubMed ID: |
21817475 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) Kondensierte Materie |
Series Title: |
Journal of Physics: Condensed Matter
21 |
Subject (ZB): | |
Publikationsportal JuSER |
We investigated the low energy excitations in NdMnO(3) in the µeV range by a backscattering neutron spectrometer. The energy spectra on polycrystalline NdMnO(3) samples revealed inelastic peaks at E = 2.15 ± 0.01 µeV at T = 2 K on both energy gain and energy loss sides. The inelastic peaks move gradually towards lower energy with increasing temperature and tend to merge with the elastic peak at the electronic magnetic ordering temperature of Nd, T(Nd)≈20 K. However, at temperatures higher than T(Nd)≈20 K the energy of the inelastic peak decreases at a much slower rate and remains finite up to T = 55 K, the highest temperature investigated. We interpret the inelastic peaks to be due to the transition between the hyperfine-split nuclear level of the (143)Nd and (145)Nd isotopes with spin I = 7/2 caused by the magnetic ordering of Nd electronic moment below T(Nd)≈20 K. We ascribe the finite energy of the inelastic peak and its much smaller temperature dependence at T>20 K to be due to the polarization of the Nd magnetic moment by the field of Mn moments that order below T(N)≈78 K. |