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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Hamann-Borrero J. E., Philipp M., Kataeva O., Zimmermann M. V., Geck J., Klingeler R., Vasiliev A., Bezmaternykh L. N., Buchner B., Hess C.
Заглавие : Nonresonant x-ray magnetic scattering on rare-earth iron borates RFe3(BO3)(4)
Коллективы :
Разночтения заглавия :авие SCOPUS: Nonresonant x-ray magnetic scattering on rare-earth iron borates R Fe 3(BO3)4
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2010. - Vol. 82, Is. 9. - Ст.94411. - ISSN 1098-0121, DOI 10.1103/PhysRevB.82.094411
Примечания : Cited References: 38. - This work was supported by the Deustche Forschungsgemeinschaft, through the Forschergruppe FOR520 (Grant No. HE3439/6) and HASYLAB at the Feyerherm from HMI Berlin and specially to Jorg Strempfer from HASYLAB at DESY in Hamburg for valuable discussions.
Предметные рубрики: SINGLE-CRYSTALS
CROSS-SECTION
GDFE3(BO3)(4)
NDFE3(BO3)(4)
DIFFRACTION
MNF2
Аннотация: Hard x-ray scattering experiments with a photon energy of 100 keV were performed as a function of temperature and applied magnetic field on selected compounds of the RFe3(BO3)4 family. The results show the presence of several diffraction features, in particular, nonresonant magnetic reflections in the magnetically ordered phase and structural reflections that violate the diffraction conditions for the low-temperature phase P3(1)21 of the rare-earth iron borates. The temperature and field dependence of the magnetic superlattice reflections corroborate the magnetic structures of the borate compounds obtained by neutron diffraction. The detailed analysis of the intensity and scattering cross section of the magnetic reflection reveals details of the magnetic structure of these materials such as the spin domain structure of NdFe3(BO3)(4) and GdFe3(BO3)(4). Furthermore we find that the correlation length of the magnetic domains is around 100 angstrom for all the compounds and that the Fe moments are rotated 53 degrees +/- 3 degrees off from the hexagonal basal plane in GdFe3(BO3)(4).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Rudenko V. V., Tugarinov V. I.
Заглавие : Temperature dependence of the uniaxial magnetic anisotropy of rhombohedral antiferromagnetic crystals with ions in the S state
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 52, Is. 1. - P112-116. - ISSN 1063-7834, DOI 10.1134/S1063783410010191
Примечания : Cited References: 19
Предметные рубрики: ALPHA-FE2O3
RESONANCE
FIELD
MNF2
Аннотация: The contributions of the anisotropic exchange to the firstand second-order uniaxial anisotropy constants have been calculated for hematite at T = 0 K and arbitrary temperatures. The results of the calculations and the most significant mechanisms are taken into account in interpreting the temperature dependence of the anisotropy in rhombohedral antiferromagnetic crystals. The first-order anisotropy constant for hematite is described by the dipole interaction, contributions of the "single-ion" nature, and relatively small contributions of the anisotropic exchange. The second-order constant for hematite includes the "single-ion" contribution and the contribution of the anisotropic exchange. For FeBO(3) and MnCO(3) crystals, the main contributions to the first-order anisotropy constant come from the dipole and single-ion mechanisms.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Malakhovskii A. V., Morozova T. P.
Заглавие : Temperature dependence of the fine structure of the C and E absorption bands in RbMnF3 below the Neel temperature
Разночтения заглавия :авие SCOPUS: Temperature dependence of the fine structure of the C and E absorption bands in RbMnF3 below the neel temperature
Место публикации : Phys. Solid State: SPRINGER, 2006. - Vol. 48, Is. 2. - P283-290. - ISSN 1063-7834, DOI 10.1134/S1063783406020156
Примечания : Cited References: 24
Предметные рубрики: PEROVSKITE FLUORIDES
VIBRONIC SPECTRA
CRYSTALS
MNF2
INTENSITY
DICHROISM
STATES
Аннотация: The variation in the parameters (width, position, intensity) of the fine structure lines in the C[(6)A(1g) - (4)A(1g), E-4(g)((4)G)] and E[(6)A(1g) - E-4(g)(D-4)] bands in RbMnF3 with temperature is studied in the temperature range 10-70 K. In the C band, two narrow ( 6 cm(-1)) lines are are distinguished at distances of 77 and 80 cm(-1) from the exciton line at T
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