Abstract
The energy and the eigenvector of the spin waves in MnTiO3 have been studied as functions of the applied magnetic field using inelastic neutron scattering with and without polarization analysis. It is found that the behaviour depends on the distance q from the antiferromagnetic zone centre: for q ≅ 0 the mode softens completely at the spin-flop field Hsf, but it has finite energy for q > 0 the eigenvector retains its Ising character for small q up to the highest fields measured (5 T = 0.86Hsf, assuming Hsf = 5.8 T), but it changes continuously with field from Ising to Heisenberg character for large q. A very strong, temperature-dependent line width was found at H = 6 T, close to Hsf, which is interpreted as further evidence for the soft-mode instability at the spin-flop transition.
| Original language | English |
|---|---|
| Pages (from-to) | 5905-5914 |
| Number of pages | 10 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 8 |
| Issue number | 32 |
| DOIs | |
| Publication status | Published - Aug 5 1996 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
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The change of the symmetry of the soft-mode spin wave at the spin-flop transition as observed in MnTiO3 using inelastic polarized neutron scattering. / Steiner, M.; Kakurai, K.; Dorner, B.; Pynn, R.; Akimitsu, Jun.
In: Journal of Physics Condensed Matter, Vol. 8, No. 32, 05.08.1996, p. 5905-5914.Research output: Contribution to journal › Article
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TY - JOUR
T1 - The change of the symmetry of the soft-mode spin wave at the spin-flop transition as observed in MnTiO3 using inelastic polarized neutron scattering
AU - Steiner, M.
AU - Kakurai, K.
AU - Dorner, B.
AU - Pynn, R.
AU - Akimitsu, Jun
PY - 1996/8/5
Y1 - 1996/8/5
N2 - The energy and the eigenvector of the spin waves in MnTiO3 have been studied as functions of the applied magnetic field using inelastic neutron scattering with and without polarization analysis. It is found that the behaviour depends on the distance q from the antiferromagnetic zone centre: for q ≅ 0 the mode softens completely at the spin-flop field Hsf, but it has finite energy for q > 0 the eigenvector retains its Ising character for small q up to the highest fields measured (5 T = 0.86Hsf, assuming Hsf = 5.8 T), but it changes continuously with field from Ising to Heisenberg character for large q. A very strong, temperature-dependent line width was found at H = 6 T, close to Hsf, which is interpreted as further evidence for the soft-mode instability at the spin-flop transition.
AB - The energy and the eigenvector of the spin waves in MnTiO3 have been studied as functions of the applied magnetic field using inelastic neutron scattering with and without polarization analysis. It is found that the behaviour depends on the distance q from the antiferromagnetic zone centre: for q ≅ 0 the mode softens completely at the spin-flop field Hsf, but it has finite energy for q > 0 the eigenvector retains its Ising character for small q up to the highest fields measured (5 T = 0.86Hsf, assuming Hsf = 5.8 T), but it changes continuously with field from Ising to Heisenberg character for large q. A very strong, temperature-dependent line width was found at H = 6 T, close to Hsf, which is interpreted as further evidence for the soft-mode instability at the spin-flop transition.
UR - http://www.scopus.com/inward/record.url?scp=0009277755&partnerID=8YFLogxK
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U2 - 10.1088/0953-8984/8/32/010
DO - 10.1088/0953-8984/8/32/010
M3 - Article
VL - 8
SP - 5905
EP - 5914
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 32
ER -