Showing papers in "Journal of Magnetism and Magnetic Materials in 1997"

TL;DR: In this article, the effect of different alloying additions substituting for nonmagnetic Si and Ge on the giant magnetocaloric effect observed for the compound Gd5(Si2Ge2) was studied.

TL;DR: In this article, the post-sintering density and the permeability of the sintered ferrite are strongly affected by the size of the starting oxide powders and the pre-sinting temperature, and the most effective method of preparing high permeability ferrite is to utilize fine particles of iron oxide and to calcine at about 800°C.

TL;DR: In this paper, different ways in heat treatment of the gel are adopted to study the factors that influence the formation mechanism, morphology and magnetic properties of BaFe12O19, and the results show that preheating the gel between 400 and 500°C for several hours is a key step, it can prevent the formation of α-Fe2O3 intermediate and obtain ultrafine BaFe 12O19 single phase with improved magnetic properties and narrow size distribution at a low temperature.

TL;DR: In this article, the transport and magnetic properties of epitaxial (La07Sr03)MnO3 (LSMO) films deposited on LaAlO3 and SrTiO3 are compared.

TL;DR: The magnetic properties of molecular beams of Fe, Co and Ni clusters deflected with a Stern-Gerlach magnet are reviewed in this article, where single-sided cluster deflections are observed indicating the occurrence of spin relaxation processes within isolated clusters.

TL;DR: In this article, the authors studied giant magnetoresistance (GMR) and related properties in Co-Al-O insulating granular films prepared by reactive sputtering and revealed that the films were composed of Co base metallic granules and Al2O3 base insulating network-like boundaries.

TL;DR: The magnetic and magnetotransport properties of manganites are strongly dependent on the doping level x and the oxygen stoichiometry z. as discussed by the authors showed that low doped manganite is magnetically inhomogeneous.

TL;DR: The phase constitution of UFP alloys is different from the equilibrium phase diagram owing to rapid condensation of evaporated metal gases as discussed by the authors, and the magnetization has almost the same temperature dependence as that of the bulk alloys.

TL;DR: In this article, the relation between microscopic properties of a ferromagnetic triple-layer system (e.g., layer thickness, material constants) and macroscopic magnetic properties such as nucleation field, remanent magnetisation and maximum energy product of the system is discussed.

TL;DR: In this paper, a technique that uses ferromagnetic resonance (FMR) to measure the saturation magnetization of ultrathin Fe films is described, and the measurements were carried out to investigate theoretical predictions that Fe atoms located at or near surfaces and interfaces should possess enhanced magnetic moments compared those of Fe atoms in the bulk.

TL;DR: In this paper, a detailed study of the magnetization reversal dynamics in ultrathin cobalt films (t Co = 6-12 A ) sandwiched by gold (1 1 1) layers, their magnetic anisotropy being perpendicular to the film surface, is presented.

TL;DR: In this paper, the numerical integration of the Gilbert equation of motion resolves magnetisation processes in time and in space, and the calculated domain patterns are in qualitative agreement with magnetic images obtained from Lorentz electron microscopy.

TL;DR: In this paper, the intrinsic anisotropy of the dangling bonds at the GaAs(0 0 1) surface was investigated and shown to be a useful property for future memory or switching applications.

TL;DR: In this article, a nanocrystalline spinel ferrite phase, MnFe 2 O 4, was formed after annealing at 600-700°C, and found to exhibit good soft magnetic properties.

TL;DR: In this paper, the authors presented the first measurements of giant magnetoresistance with current perpendicular to the layer planes (CPP-MR) of an exchange-biased spin-valve (EBSV) -a controllable spin-switch.

TL;DR: In this paper, a detailed study by magneto-optical techniques of in-plane magnetization reversal behaviour in epitaxial Fe films grown by MBE on (10 0) oriented MgO substrate was undertaken.

TL;DR: In this paper, the authors demonstrate that highly ordered equiatomic FePd thin layers can be grown in the L1 0 structure using Molecular Beam Epitaxy, which exhibits a strong perpendicular magnetic anisotropy.

TL;DR: In this paper, the reduction of nickel in silica gels was measured as a function of nickel content within the temperature range 600-900°C. Magnetic measurements have shown that the particles size is nearly independent of the nickel content while its distribution becomes wider when it increases.

TL;DR: In this article, a magnetoresistive GMR sensor scheme for detection of angular positions is demonstrated and analyzed in which the hard magnetic layers are replaced by artificial antiferromagnetic subsystems (AAFs).

TL;DR: In this paper, the distribution of energy barriers (E b ) of an assembly of small magnetic particles with a median diameter of 70 A was analyzed. But the system is not adequately described by the commonly adopted log-normal distribution function, which comparably should yield an excess amount of large particles sizes.

TL;DR: In this paper, a two stage process of irreversible domain wall movement during magnetization is proposed considering the grain boundaries and second phase precipitates as the two major obstacles to domain wall movements.

TL;DR: In this paper, the size and polydispersity of the cobalt boride particles are controlled by the size of the water droplets, which increases from 4 to 7.5 nm by increasing the water content.

TL;DR: In this paper, the XeCl excimer laser (λ = 308 nm) ablation of both Fe3O4 and metallic 57Fe targets has been investigated in an attempt to fabricate films reproducibly at low laser fluences so as to minimize ablation bouldering.

TL;DR: In this paper, the electrical resistivity of Zn x Ni 1-x Fe 2 O 4 samples was studied as a function of temperature T c and composition x c, and the activation energy for the electric conduction in the paramagnetic region was found to be higher than that in the ferrimagnetic region.

TL;DR: In this article, the magnetic properties of Fe 38.5Pt, Fe 39.5pt and Fe 50.0pt alloys were investigated using a vibrating sample magnetometer, and correlated with the microstructures of the alloys by transmission electron microscopy.

TL;DR: In this article, the annealing temperature dependence of the magnetic behavior was investigated by means of transmission 57 Fe Mossbauer spectrometry and DC magnetic measurements, in the range 50-700 nm.

TL;DR: In this article, the solidification of molten alloys in a static magnetic field is proposed as a new way of orienting polycrystalline materials, and the orientation of the sample, solidified in a cold induction crucible, is analyzed as a function of the applied magnetic field.

TL;DR: In this article, the authors measured axial hysteresis loops of glass-coated amorphous Fe 70 B 15 Si 10 C 5 microwires with a single and large Barkhausen jump even for samples as short as 5 mm long.

TL;DR: In this article, the authors investigated magnetism, morphology and structure of nickel films grown epitaxially on a single crystal to explore the potential of modifying magnetic anisotropies by epitaxial strains.

TL;DR: In this paper, an analytical transmission electron microscope equipped with an energy dispersive X-ray analyzer was used to investigate the microscopic segregation structures of Co-15.2 at% Cr-4.3 at% Ta and Co-13.4 at% Co-1.0 at% Pt longitudinal magnetic recording media.