Electronic structures and magnetism of diluted magnetic semiconductors Sn1−xGdxTe: A density functional theory study J. Appl. Phys. 112, 083720 (2012) Model GW study of the late transition metal monoxides J. Chem. Phys. 137, 154110 (2012) High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (Sr1−xLax)2ErRuO6 J. Appl. Phys. 112, 073714 (2012) Thermoelectric effect in a graphene sheet connected to ferromagnetic leads J. Appl. Phys. 112, 073712 (2012) Optoelectronic and magnetic properties of Mn-doped indium tin oxide: A first-principles studyThe temperature dependence of the saturation magnetization and the magnetocrysta11ine anisotropy field have been measured on single-crystal samples of the R 2 Fe l4 B compounds for R = Y, Ce, Pr, Nd, Sm, Gd, Th, Dy, Ho, Br, and Tm from 4.2 K to the magnetic ordering temperatures. A spin reorientation transition of the Nd 2 Fe l4 B type has been found in H0 2 Fe l4 B at 57.6 K in zero field. Another type of spin reorientation caused by anisotropy compensation between the Fe and the R sublattices exists in Er 2 Fe 14 B and Tm 2 Fe I4 B. The temperature dependence of the angle of the easy direction of magnetization from the c axis has been measured for R = Nd, Ho, Er, and Tm. The relation between the magnetocrystalline anisotropy and the sublattice magnetization is investigated by employing a simplified two-sublattice molecular field model.

A comprehensive review of the Nd–Fe–B permanent magnet material is given. A historical survey, the basic magnetic properties of Nd2Fe14B and isomorphous compounds, a phase diagram for the ternary Nd–Fe–B system, processing techniques and magnetic properties of sintered Nd–Fe–B magnets, and the future directions for improvements of this type of permanent magnet are discussed.

The NdFe 12 N x compound with a ThMn 12 structure (space group I4/mmm) was successfully synthesized by nitriding an NdFe 12 layer grown on a W underlayer on a single-crystalline MgO (001) substrate. The c-axis expanded from 0.480 to 0.492 nm while the a-axis showed a slight contraction from 0.852 to 0.849 nm after the nitriding. Excellent intrinsic hard magnetic properties of l 0 M s % 1.66 ± 0.08 T, l 0 H a % 8 T, and T c % 550°C, which are superior to those of Nd 2 Fe 14 B, were obtained.

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Static magnetic measurements have been carried out on single crystals of Nd2Fe14B, Sm2Fe14B, and Y2Fe14B from 4.2 to 590 K. Values of K1 estimated from high field measurements at room temperature are 4.5, −12, and 1.1 MJ/m3 for Nd2Fe14B, Sm2Fe14B, and Y2Fe14B, respectively. Anisotropic behavior of the magnetization versus magnetic field curves in the basal plane has been observed for Sm2Fe14B, indicating large amplitude of the high order coefficients, K2 and K3. In Nd2Fe14B, the magnetization has been found to tilt from the c axis and simultaneously increase in magnitude. Average Fe moment is estimated to be 2.23 μB/Fe at 4.2 K from the saturation magnetization of Y2Fe14B.