Chapter 1 Magnetism of ternary intermetallic compounds of uranium

Publisher Summary The muon spin rotation/relaxation/resonance (μSR) spectroscopy has become an important tool for probing local static and dynamic magnetic properties. In over two decades a quite substantial body of μSR data has been collected from rare-earth and actinide materials, the latter, however, mostly restricted to samples containing uranium. μSR is the measurement of the temporal development of the spatial orientation of the spins of muons, which have been implanted in the material of interest with all spins initially fixed in one direction (complete muon spin polarization). μSR can be performed either with positive or negative muons. The latter behave like heavy electrons and will be captured into Bohr orbits by the atoms in the sample material. They will quickly reach the ls ground state, whose orbital radius, however, is comparable to nuclear radii. Negative muons thus sense predominantly the effects of the protonic charge distribution and the result is primarily of interest to nuclear physics. The magnetic field at the site of the muon in a magnetic compound is, at least in part, created by the dipole moments on neighboring paramagnetic atoms or ions.

Chapter 206 μSR studies of rare-earth and actinide magnetic materials

The results of magnetization measurements on , which orders antiferromagnetically , show interesting thermomagnetic irreversibility and metamagnetic behaviour. The possible origins of such effects are discussed.

https://iopscience.iop.org/article/10.1088/0953-8984/9/11/014/pdf

The thermomagnetic irreversibility and metamagnetic behaviour of

The structure and properties of quasicrystals are discussed. The short-and long-range atomic orders and the effect of these factors on the physical characteristics are considered. It is noted that investigations of the physical properties of quasicrystals at temperatures above room temperature should be performed. Promising applications are briefly outlined.

Quasicrystals: Structure and properties

Modulated magnetic structures in UPd2Ge2

Ferromagnetism in the icosahedral Al62.5B7.5Pd15Fe15 quasicrystal

The magnetic susceptibility, hysteresis curves, ZFC and FC magnetic moments and magnetoresistance measurements indicate the appearance of a spin glass state in UPd2Ge2 below 87 K, and the existence of a ferromagnetic phase below 80 K. From these studies and taking into account the neutron diffraction data a mixed spin glass-ferro-antiferromagnetic state is suggested in the low-temperature region.

I.S. Lyubutin

Papers

Ferromagnetism in the icosahedral Al62.5B7.5Pd15Fe15 quasicrystal

Spin-glass-like behaviour in UPd2Ge2

Magnetic properties of U(Pd1 − xFex)2Ge2

Magnetic phase transitions in UPd2Ge2

Magnetic properties of the icosahedral (Al,Ge)70Pd12.5Mn17.5 quasicrystals