Electronic structure of MnSb

Structure and magnetic properties of the MnBi low temperature phase

“…It can be seen that the magnetization curves along the hard axis become easier to saturate when the temperature decreases, which indicates that the uniaxial anisotropy decreases with decreasing temperature, and tends to planar anisotropy below 50 K. This is consistent with our neutron data. Our neutron data show a canted magnetic structure below 200 K, different from the results obtained from the magnetization curves of a LTP single crystal, 15 where a basal-plane anisotropy was observed below 100 K. Coehoorn et al 17 have reported that the spinorbit interaction plays a key role in the anisotropy at low temperatures for MnBi, in as much as the magnetic dipole- dipole interaction cannot explain the basal anisotropy at low temperature. Additionally, recent band calculations with spin-orbital coupling and orbital polarization still result in disagreement between theoretical and experimental results.…”

“…2, the magnetic moment of the Mn atom shows a small temperature dependence in the range from 10 to 300 K. The magnetic moment per Mn is 3.60 B and 4.18 B at room temperature and 10 K, which is well in agreement with the magnetic measurements on polycrystalline MnBi, 4,8 on single crystals, 15 and with theoretical band calculations. 17,18 The value at room temperature ͑RT͒ is considerably less than that obtained by previous neutron diffraction measurements, 7 where a value of 4.5 B was claimed at RT. Below 200 K, the magnetic moments of Mn deviate gradually from the direction parallel to the c axis and into the direction nearly perpendicular to the c axis at 50 K. A sharp increase of the angle between Mn magnetic moments and the c axis is observed around 90 K. However, the magnetic moment still shows a very small c-axis component at 10 K, i.e., it is not totally in the basal plane.…”

Epitaxial growth and surface properties of half-metal NiMnSb films

“…These changes in polarization and density of states represent a decrease in surface metallicity along with the disappearance of the inferred gap in the spin minority subband and, therefore, loss of half-metallic character in the surface [11,49,50]. The behavior of this segregated surface is more reminiscent of a MnSb binary alloy [106][107][108][109] or of an antiferromagnetically aligned Mn rich surface layer, than of the expected electronic structure of NiMnSb.…”

Общность процессов спонтанного и вынужденного перемагничивания кластеров MnSb, внедренных в тонкие пленки GaMnSb

“…Из аппроксимации высокотемпературной части зависимо-сти M(T ), показанной на рис. 4 сплошной линией, была определена температура Кюри T C = 650 ± 60 K, которая оказалась близка к известному значению 590 K для соединения MnSb [16], и значение показателя сте-пени α = 2.4 ± 0.2. Известно, что для наночастиц из-за эффектов ограничения размера наблюдаются откло-нения от " закона 3/2".…”