Magnetovolume effect in ThMn12-type Fe-rich R(Fe,Nb)12-based compounds

Magnetovolume effect in Ho2Fe17-xMnx compounds

4f-3d interaction and magnetic anisotropy in ThMn12-type rare-earth transition-metal compounds

Rare-earth (R) transition-metal (T) compounds of the R(T,M)12-type with R = Y or one of the heavy-rare-earth elements, T = Fe or Co and M = Ti, V, Mo or Si, have been studied at 4.2 K in the Amsterdam High-Field Installation in magnetic fields up to 38 T and at temperatures between 4.2 and 1000 K in other magnetometers. The 4f -3d interaction is derived from magnetization measurements on single...

MAGNETOVOLUME EFFECT IN FERROMAGNETIC METALS : NUMERICAL RESULTS FOR BCC Fe AND FCC Ni

The magnetovolume effect in ferromagnetic bcc Fe and fcc Ni is estimated numerically in the fixed moment method by using the LMTO method and the local spin density approximation. The obtained results are compared with the experimental results. The magnetovolume effect is discussed by using the local spin density approximation [I-31 or by using the Stoner model where the volume dependence of the...

Theoretical screening of intermetallic ThMn12-type phases for new hard-magnetic compounds with low rare earth content

We report on theoretical investigations of intermetallic phases derived from the ThMn12-type crystal structure. Our computational high-throughput screening (HTS) approach is extended to an estimation of the anisotropy constant K1, the anisotropy field Ha and the energy product (BH)max. The calculation of K1 is fast since it is based on the crystal field parameters and avoids expensive total-ene...

Multiband magnetism and superconductivity in Fe-based compounds

Recent discovery of superconductivity in Fe-based layered compounds may have opened a new pathway to the room temperature superconductivity. A model Hamiltonian describing FeAs layers is introduced, highlighting the crucial role of puckering of As atoms in promoting d electron itinerancy and warding off large local-moment magnetism of Fe ions, the main enemy of superconductivity. Quantum many-p...