Zobrazeno 1 - 10
of 61
pro vyhledávání: '"F. Tchéou"'
Publikováno v:
Solid State Communications. 18:871-875
The TbCrO 4 zircon-like compound was investigated by X-ray and neutron diffraction experiments in the 4.2–300 K temperature range. It first undergoes a second order phase transition at about 48 K from a tetragonal symmetry: Ia 1 /4 amd ( D 19 4 h )
Publikováno v:
Zeitschrift f�r Physik B Condensed Matter. 44:53-57
Specific heat measurements have been carried out on single crystals of Erbium and Yttrium Iron garnets between 5 and 210K. The ErIG specific heat presents two anomalies. The first one situated at (77±4)K corresponds approximatively to the compensati
Publikováno v:
Journal de Physique. 45:163-167
Neutron diffraction experiments have been performed on powder samples of TbGe 0.2 Si 0.8 and ErSi. They order respectively at T N =55K and 11.5K with a pure sine wave modulation propagating along the [100] direction of the orthorhombic unit cell. The
Publikováno v:
Journal of Physics C: Solid State Physics. 18:3551-3555
A single-ion theory is used to account for the magnetic phase transitions (uvO) to or from (110) to or from (111) observed in samarium iron garnet (Sm2Fe55O12) at low temperatures, the low value of the magnetic moment at 0K, and the crossover tempera
Publikováno v:
Solid State Communications. 33:827-832
Magnetization and susceptibility measurements have been performed on single crystals of dysprosium gallium garnet along different axes. The isothermal magnetization curves in the temperature range 1.2K – 4.2K with applied fields up to 70 kOe are we
Publikováno v:
Solid State Communications. 23:613-616
The specific heat of a single crystal of dysprosium gallium garnet (Dy GaG) has been measured between 37 mK and 2 K using a double-stage demagnetization cryostat. An antiferromagnetic ordering occurs at TN = 0.373 K. The value of the entropy at 2 K i
Publikováno v:
Zeitschrift für Physik B Condensed Matter. 44:41-52
The magnetic properties of single crystals of erbium iron garnet (ErIG) were studied in applied fields up to 150kOe between 1.4 and 300K. At low temperature, the macroscopic easy direction of the bulk magnetization is [100]; below the compensation te
Publikováno v:
Solid State Communications. 17:101-105
Using a crystal-field calculation within a point charge model, we interpret the rare-earth magnetic moment direction in the equiatomic rare earth-silicon compounds of CrB type. We showed that the 2nd order crystal-field parameter V 2 2 is predominant
Publikováno v:
Journal of Physics C: Solid State Physics. 13:1277-1283
Specific heat, magnetisation and susceptibility measurements on a single crystal of ytterbium gallium garnet (YbGaG) have been performed between 44-600 mK for the specific heat measurements and from 70 mK up to 4.2K for the magnetisation and suscepti
Publikováno v:
Zeitschrift f�r Physik B Condensed Matter. 56:29-39
Using neutron diffraction data, the thermal evolution of the magnetic structure of Ho3Fe5O12 has been studied. Below the compensation temperature (Tcomp=137 K), the umbrella structure parameters which fit the spontaneous ferrite magnetizations have b