Marko Miljak

Superconductivity in zirconium-nickel glasses

Abstract The superconducting transition temperatures (Tc) and magnetic susceptibilities of amorphous Zr100−xNix alloys have been measured. Tc decreases linearly with increasing x. The results are compared to those for amorphous Zrue5f8Pd and Zrue5f8Cu alloys and discussed in terms of changes in the electron to atom ratio on alloying.

Novel spin lattice in Cu3TeO6: an antiferromagnetic order and domain dynamics

We report on the magnetic properties of an insulating cubic compound Cu3TeO6 studied by ac and dc susceptibility, torque magnetometry and neutron powder diffraction. A novel three-dimensional magnetic lattice composed of almost planar regular hexagons of Cu2+xa0S = 1/2 spins is present in Cu3TeO6. The magnetic susceptibility in the paramagnetic state obeys the Curie–Weiss law in the 200–330xa0K regime with ΘCW = −148xa0K and at TN = 61xa0K system undergoes an antiferromagnetic phase transition. Above TN the susceptibility is isotropic. Below TN a large anisotropy develops in fields H≥500xa0Oe. Torque measurements reveal the presence of antiferromagnetic domains below TN. In a rather low magnetic field (xa0Oe) switching of domains is observed. The dynamics related to movement of domain walls is very slow at low temperatures (of the order of 102xa0s) and interferes with all torque measurements. The presence of domains is a consequence of the symmetry of the underlying magnetic lattice. Neutron powder diffraction reveals that antiferromagnetic long-range order is associated with the wavevector . The dominant component of the magnetic moment is along one of the space diagonals of the cubic unit cell, but it is not possible to resolve whether the structure is collinear or canted.We report on magnetic properties of cubic compound Cu3TeO6 studied by

Easy plane anisotropy in Bi2CuO4.

ac

Kondo effect in Ce x La 1 − x Cu 2.05 Si 2 intermetallics

and

The magnetic state of the low dimensional CuTe2O5 compound below 20 K

dc

A new modification of nickel selenite NiSeO3 – crystal structure and magnetic properties

susceptibility and neutron powder diffraction for the first time. A novel magnetic lattice, three dimensional spin web, composed of almost planar regular hexagons of Cu2+, S =1/2 spins, defines the properties of Cu3TeO6. The behavior of the magnetic susceptibility in the paramagnetic state at approximately 170 K is suggestive for a competition between local anisotropies of Cu2+ hexagons. The resulting frustration is weaker than the antiferromagnetic nearest-neighbor interaction which leads to a collinear (or slightly canted) spin arrangement (k=0,0,0) and formation of magnetic domains below TN=61 K.

Magnetic anisotropy of paramagnetic and ferromagnetically ordered state of single crystal BaVSe3

dc Magnetic susceptibility measurements and the torque magnetometry were used to experimentally probe the symmetry of the antiferromagnetically (AFM) ordered state of Bi(2)CuO(4). A phenomenological approach to the anisotropy energy is used to model the angular dependence of torque for easy axis and easy plane anisotropy. Comparison of these results with the experimentally obtained curves leads to the conclusion that the antiferromagnetically ordered state in Bi(2)CuO(4) has an easy plane anisotropy with the c plane as an easy plane. The estimated value of the critical field for the spin-flop in the easy plane is H(c)≈15-20 kOe giving the easy plane anisotropy energy constant K(22)≈27-47×10(3) erg mol(-1). The resulting antiferromagnetic structure contains two equally populated mutually perpendicular AFM domains in zero magnetic field.

Kondo effect inCexLa1−xCu2.05Si2intermetallics

The magnetic susceptibility and susceptibility anisotropy of the quasibinary alloy system

Kondo effect in CexLa1-xCu2.05Si intermetallics

{mathrm{Ce}}_{x}{mathrm{La}}_{1ensuremath{-}x}{mathrm{Cu}}_{2.05}{mathrm{Si}}_{2}

Crystal Structure and Magnetic Properties of Co2TeO3Cl2 and Co2TeO3Br2

have been studied for low concentration of Ce ions. The single-ion description is found to be valid for