We report first-principles calculations for Fe4Al11-x where 0 ≤ x ≤ 3 and for Fe4Al11-yZny for 0 ≤ y ≤ 1. We investigate the correlation of the magnetic and vibrational behavior with the density of states at the Fermi level. For Fe4Al11-x the magnitude of the magnetic moment correlates with the number of Fe in the chains. However we also find an intrinsic contribution to the magnetism associate...

– The multipole expansion technique is applied to one of the largest magnetic molecules, Fe30. The molecule’s dipole, toroid and quadrupole magnetic moments are equal to zero (in the absence of magnetic field) so the multipole expansion starts from the octopole moment. Probably the Fe30 molecule is the most symmetrical magnetic body synthesized so far. The magnetization process is considered th...

Coupling between a magnetic impurity and an external bath can give rise to many-body quantum phenomena, including Kondo and Hund's impurity states in metals, and Yu-Shiba-Rusinov states in superconductors. While advances have been made in probing the magnetic properties of d-shell impurities on surfaces, the confinement of f orbitals makes them difficult to access directly. Here we show that a ...

Pr3In is a single ground state compound which exhibits antiferromagnetic order below 11.4K due to the exchange induced admixture of crystalline electric field levels. Additional information regarding the complex magnetic behavior of this compound can be gained through application of magnetic fields. We report specific heat and magnetocaloric effect measurements to 15T and magnetization measurem...

The magnetization measurements at 5 K were carried out for Ni2Mn1 − xCuxGa (0 ≤ x ≤ 0.40) and Ni2MnGa1 − yCuy (0 ≤ y ≤ 0.25) alloys. All of the magnetization curves are characteristic of ferromagnetism or ferrimagnetism. By using Arrott plot analysis the spontaneous magnetization of all samples was determined from the magnetization curves. The magnetic moment per formula unit, μs, at 5 K was es...

The finite size and surface roughness effects on the magnetization of NiO nanoparticles is investigated. A large magnetic moment arises for an antiferromagnetic nanoparticle due to these effects. The magnetic moment without the surface roughness has a non-monotonic and oscillatory dependence on R, the size of the particles, with the amplitude of the fluctuations varying linearly with R. However...

This study was performed in connection with the experiment planned by researchers from three institutions (Institute of Theoretical and Experimental Physics, Joint Institute for Nuclear Research, and the All-Russia Research Institute for Experimental Physics) to look for the magnetic moment of the electron neutrino [1]. This experiment is presumed to study the spectra of energy deposited in a d...

For many years one of the basic tenets of plasma physics has been the invariance, or constancy, of the magnetic moment of a charged particle in a magnetic field that varies slowly in time or space. However it is proposed here that this is invalid and that the magnetic moment is not constant: it is a function of the magnetic flux density. It is shown that there are contradictions within the conv...