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Showing papers in "Journal of Magnetism and Magnetic Materials in 1992"


Journal ArticleDOI
TL;DR: In this paper, devitrified glassy FeCuNbSiB alloys are used to reveal a homogeneous ultrafme grain structure of bcc-FeSi with grain sizes of typically 10-15nm and random texture.

452 citations


Journal ArticleDOI
TL;DR: In this article, the magnetocaloric effect for superparamagnetic materials is calculated as a function of temperature, field and cluster size, and a universal curve is calculated from which an optimum cluster moment may be found for maximum entropy change upon application of a given field H at a given temperature T. Quantum effects are shown to be small for temperatures above 10 K and fields less than a few tesla.

446 citations


Journal ArticleDOI
TL;DR: In this paper, the exchange coupling of Fe films across Al- and Au-interlayers with good epitaxial growth was investigated and the results strongly support an RKKY-type mechanism as the microscopic origin of these couplings.

153 citations


Journal ArticleDOI
TL;DR: In this paper, the influence of dipolar interactions between the particles on the value of T g is discussed by considering the effects of particle interactions on the blocking temperature, and an effective blocking temperature model is developed.

146 citations


Journal ArticleDOI
TL;DR: In this paper, a comparative study of the band structure on the basis of local spin-density functional theory is presented for the ferrites Fe 3 O 4, CoFe 2 O 4, NiFe 2O 4, MnFe 2 OD 4 and ZnFe 2 OM 4.

126 citations


Journal ArticleDOI
TL;DR: In this article, the temperature and field dependence at 4.2 K of the magnetization of Y2Fe17−xAlx and Ho2Fe 17−xalx (x ≤ 10) compounds has been studied.

125 citations


Journal ArticleDOI
TL;DR: In this article, the energy-level schemes for Cr 2+ ion in the quasi-two-dimensional (2D) mixed system Rb 2 Mn x Cr 1− x Cl 4 are investigated using the superposition model in order to discriminate between the two energylevel schemes assigned previously to the ground states ∥ x 2 − y 2 ǫ and ∥z 2 〉.

124 citations


Journal ArticleDOI
TL;DR: In this paper, it was shown that magnetic exchange-coupling exists between Fe films separated by a non-metallic amorphous Si layer at 40 K and with increasing Si thickness the coupling oscillates from ferro-to antiferromagnetic and back to ferromagnetic with an approximate period of 16 A.

113 citations


Journal ArticleDOI
TL;DR: In this article, a model for the local magnetic moments mK on the Fe atom, which describes the form of the average magnetic moment m as a function of Al content, was constructed.

111 citations


Journal ArticleDOI
TL;DR: In this paper, the magnetoresistance ratio of single-layer Co-Ag alloy thin films sputtered from a composite target was measured at room temperature in as-deposited, single layer CoAg Alloy thin films.

104 citations


Journal ArticleDOI
TL;DR: In this paper, the authors found that the ferromagnetic coupling between electrodes of the junction strongly modified the domain structures and magnetization reversal processes in the area of tunnel junction, and that the hysteresis of tunneling resistance was closely connected with magnetization processes.

Journal ArticleDOI
TL;DR: In this article, a series of sputtered Fe(30{Angstrom})/Si(x) superlattices were grown for x=10-40{AOe), with switching fields of 6kOe.

Journal ArticleDOI
TL;DR: In this paper, the electronic and magnetic structure of fcc (γ-)Fe is determined using the local spin-density functional approximation and the ASW method to solve the band-structure problem self-consistently.

Journal ArticleDOI
TL;DR: In this article, a Mossbauer study of isomer shift, hyperfine field and electric field gradient for γ′-Fe 4 N was presented with the aid of an ab-initio electronic structure calculation using the self-consistent (LMTO) method.

Journal ArticleDOI
TL;DR: In this article, the existence of interstitial Sm2Fe17Nx with intermediate nitrogen contents (0 ≤ x ≤ 2.94) is revealed by a continuous increase of the unit cell volume, the Curie temperature, the saturation polarization and the anisotropy field with increasing N concentration.

Journal ArticleDOI
TL;DR: In this paper, the aqueous cores of water-in-oil microemulsions were used as constrained microreactors for the precipitation of precursor carbonates of Ba 2+ and Fe 3+.

Journal ArticleDOI
TL;DR: In this paper, the axial demagnetizing field which depends on the inner core dimensions and the strength of internal and applied stresses play a decisive role in determining the switching process.

Journal ArticleDOI
TL;DR: In this paper, a simple phenomenological model is introduced to characterize magnetic interactions and the δM curve is defined as a normalized difference of the two principal remanent curves: the isothermal remanent curve Mr and the dc demagnetization curve Md.

Journal ArticleDOI
TL;DR: In this article, the magnetic anisotropy of a FINEMET-type alloy induced by stress-annealing was investigated, which consists of creep-induced and magneto-elastic components.

Journal ArticleDOI
TL;DR: In this article, a phenomenological theory for the lineshift was proposed for the second and third powers of the linewidths for the samples frozen in a finite applied field and a zero field, respectively.

Journal ArticleDOI
TL;DR: In this article, the field dependence of the peak in the dc susceptibility has been studied for a weakly interacting fine particle system consisting of Fe 3 O 4 particles, and it has been shown that T g moves to lower temperatures as the sample is warmed up in a large dc field.

Journal ArticleDOI
TL;DR: In this paper, the authors report and discuss experimental data on the thermoelectric power of magnetic multilayers and ascribe the high temperature part of the MTEP to spin-dependent electron-magnon scattering.

Journal ArticleDOI
TL;DR: In this article, the first observation of a giant magnetoresistance (MR) in Co/Cu superlattices grown by MBE was made and the maximum value of the MR was -26% and this was found in a specimen for which the copper layers are about 7 A thick and which includes a thin 10 A layer of gold in the buffer region between the substrate and the super-lattice.

Journal ArticleDOI
TL;DR: In this article, the low-temperature properties of ternary compounds are reviewed and a wide variety of unusual features, including magnetic ordering, nonmagnetic or superconductive heavy-fermion state, valence fluctuation, etc.

Journal ArticleDOI
TL;DR: In this article, the basic exchange interactions for a variety of (R, T) compounds, in particular RT 2 (R: rare earth, or Y; T: transition metal), were discussed.

Journal ArticleDOI
TL;DR: In this article, the spontaneous magnetization of ferromagnetic clusters of various structures and sizes has been modeled with the Heisenberg model, and a self-consistent spinwave-spectrum is found by direct diagonalization of the equation of motion of S+.

Journal ArticleDOI
TL;DR: In this article, the influence of Cu/Nb content and annealing conditions on the microstructure and the magnetic properties of melt spun amorphous Fe77.5−xSi13.5B9CuxNb3x alloys were investigated.

Journal ArticleDOI
TL;DR: In this article, the authors demonstrate the feasibility of applyying the novel soft-X-ray magnetic circular dichroism (SXMCD) technique to investigate the magnetic properties of magnetic surfaces and ultrathin films.

Journal ArticleDOI
TL;DR: The microstructure and magnetic properties of sputtered Fe-Pt thin films were studied as a function of Pt content from 0 to 60 at% Polycrystalline ferromagnetic films were obtained in the range studied as discussed by the authors.

Journal ArticleDOI
TL;DR: In this paper, the effect of various types of coupling on magnetic domains has been studied in the Fe/Cr system and it was shown that the magnetic domain magnetoresistance is due to spindependent electron scattering at the FeCr interfaces.