Showing papers in "Journal of Magnetism and Magnetic Materials in 2002"

TL;DR: In this paper, the authors developed analytical relationships and computations of power dissipation in magnetic fluid (ferrofluid) subjected to alternating magnetic field and showed that the dissipation results from the orientational relaxation of particles having thermal fluctuations in a viscous medium.

TL;DR: In this article, a theory for electron transport across a very thin non-magnetic metallic spacer joining two ferromagnetic metals whose moment vectors include a general angle is given.

TL;DR: In this paper, the authors discuss the critical issues of improved magnetic performance, environmental stability, net-shape formability and magnetization behavior for the main categories of NdFeB magnets.

TL;DR: In this paper, a review of magnet applications is presented, classifying the magnet applications in terms of the nature of the field, the effect on the magnet and the physical effect exploited.

TL;DR: In this article, the authors investigated the metallurgical transformations that occur during heat treatment of Nd-based magnets and showed that thin and smooth RE-rich film is associated with the highest coercivity.

TL;DR: The giant magneto-impedance effect (GMI) as mentioned in this paper is a phenomenon that changes the complex impedance of soft magnetic materials upon the application of an external magnetic field, which is strongly dependent on the frequency of the applied current and the magnetic anisotropies present in the material, among other factors.

TL;DR: In this article, the authors identify the driving forces which can cause ferromagnetic and ferroelectricity to occur simultaneously in multiferroic magnetoelectrics, and show that their scarcity results from transition metal d electrons, which are essential for magnetism.

TL;DR: In this article, the effect of substitution of rare-earth La 3+ by hexagonal ferrites has been investigated by XRD, VSM and Mossbauer spectrum, and it has been shown that the substituted amount x at the maximum value of H cJ is bigger than that of σ s.

TL;DR: The biokinetic behavior of Iod[123]-labelled ferrofluids in vivo and in vitro showed in vitro that the ferro fluid concentration is dependent on the magnetic field strength.

TL;DR: In this paper, the temperature dependence of the magnetic viscosity S(T) is determined for 1.8 ⩽T⩽40 K. S is temperature independent for T

TL;DR: In this paper, a detailed measurement of the magnetic field and temperature dependence of magnetization in nanocrystalline YIG (Y 3 Fe 5 O 12 ) particles is presented.

TL;DR: In this paper, the Taylor-Ulitovsky method for fabricating glass-coated microwires with different structures of metallic nucleus is discussed. The main parameters of the process can be distinguished as follows: a casting rate of microwire and its limits, cooling rate of the metal core, geometrical characteristics and alloy composition.

TL;DR: In this paper, the static domain wall structures in nanowires with axial magnetization were studied by applying an axial field, and the wall dynamics was computed and compared to analytical models.

TL;DR: The science and technology of conventional ferrite magnets, including their historical evolution and models to explain their properties, are reviewed in this article, and a survey is given of the new LaCo-type ferrite magnet, representing a breakthrough in magnetic performance.

TL;DR: In this article, a vortex structure with turned-up magnetization at the core of a circular dot of permalloy with an appropriate size is realized, and the existence of the perpendicular magnetization spot has been confirmed and the direction of the magnetization, up or down, has been determined by magnetic force microscopy.

TL;DR: In this article, the magnetic properties of isotropic NdFeB powders used for bonded magnets are compared with respect to existing powders, and the advantages of spherical powders for injection molding are highlighted.

TL;DR: In this article, the authors developed a new method for soldering the amorphous wire and assembly of the MI chip, which yielded an MI sensor with a sensitivity of 250mV/Oe, has stable temperature characteristics between −40°C and 85°C, and easily passed the thermal shock test.

TL;DR: In this article, Ni-ferrites were prepared at different temperatures via sol-gel method and the electromagnetic properties of these materials, namely permittivity and permeability were measured in the 0.1-13 GHz frequency range.

TL;DR: In this article, the effect of Cu addition to the FePt alloy on the ordering kinetics and the coercivities of sputter deposited thin films was investigated, and the lattice parameters of the L1 0 -ordered phase suggest that Fe atoms are substituted by Cu atoms.

TL;DR: In this paper, it was shown that when two magnetic dots are embedded in a nanowire, the single electron tunneling process is controlled by an external magnetic field, which depends on the relative angle of the magnetic moments.

TL;DR: In this article, the stability of magnetic vortex with respect to displacement of its center in a nano-scale circular cylinder made of soft ferromagnetic material is studied theoretically and the mode of vortex displacement producing no magnetic charges on the cylinder side is proposed and the corresponding absolute single domain radius of the cylinder is calculated as a function of its thickness and the exchange length of the material.

TL;DR: In this paper, the minimum energy paths and energy barriers are calculated for complex micromagnetic systems based on the nudged elastic band method and uses finite-element techniques to represent granular structures.

TL;DR: In this paper, the magneto-impedance (MI) sensor utilizing the MI effect in zero-magnetostrictive amorphous wires and the stress impedance (SI) sensors utilizing the SI effect in negative-MAGNETO-AMO wires are presented.

TL;DR: In this paper, Ni0.8Zn0.2Fe2O4 was prepared by flash combustion technique and sintered at various sintering temperatures such as 1150, 1250, and 1350°C. Magnetic properties like hysteresis parameters, saturation magnetisation and Curie temperature were studied.

TL;DR: In this article, the authors applied finite element techniques combined with the boundary element method to accurately calculate the magnetostatic interaction between several wires, and found that for an array of wires the coercive field is significantly lower than it is for a single nanowire.

TL;DR: In this paper, the physics which control magnetic behavior on the nanometre scale is described, with particular reference to a phenomenon known as configurational anisotropy, and two potential applications of magnetic nanodots: high sensitivity magnetic field sensors and high density low power magnetic logic gates.

TL;DR: In this article, a complete metal filling of the hexagonal arranged pores with a pitch of 100 nm and a monodisperse pore diameter of iO30 nm was obtained.

TL;DR: In this article, structural, magnetic and transport properties of thin films of the Heusler compounds Cu 2 MnAl, Co 2 MnSi, Co2 MnGe and Co 2 NMSn prepared by RF-sputtering are reported.

TL;DR: In this paper, the authors have grown single-crystal Co ferrite (CoFe2O4) on MgO(0,0,1) by oxygen-plasma-assisted molecular beam epitaxy (OPA-MBE), and have characterized the composition, structure, surface morphology, and magnetic properties by a number of methods.

TL;DR: In this paper, a detailed description for the solution of the Landau-Lifshitz-Gilbert equation with the finite element method is given, and the use of implicit time integration schemes with proper preconditioning is reported.