Journal ArticleDOI
Torque Measurements of the Anisotropy of Energy and Magnetization of Nickel
TLDR
In this article, an analysis of experimental methods and the design of an appropriate torquemeter made it possible to improve by several orders of magnitude the accuracy of anisotropy measurements.Abstract:
An analysis of experimental methods and the design of an appropriate torquemeter made it possible to improve by several orders of magnitude the accuracy of anisotropy measurements. The experiments performed on nickel between 100°K and the Curie point allowed, for instance, the determination of the eighth‐order anisotropy constant K3 within a few percent. The anisotropy constants K1, K2, and K3 are found to be negative in this whole temperature range. An explanation is given of the main discrepancies in published data between the numerous determinations of anisotropy constants by static methods. The influences of both anisotropy of energy and anisotropy of magnetization are separated and measured as functions of applied magnetic field and temperature in the above‐mentioned range. This interpretation of torque measurements has been confirmed by a direct determination of anisotropic magnetization of nickel at room temperature, and an absolute measurement of the saturation magnetization of nickel at 20°C has ...read more
Citations
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Journal ArticleDOI
Exploring the microscopic origin of magnetic anisotropies with X-ray magnetic circular dichroism (XMCD) spectroscopy
TL;DR: In this article, a simple ligand field model was developed to visualize the origin of magnetocrystalline anisotropy in terms of the preferred direction of the orbital moment, corresponding to the direction of maximum size.
Journal ArticleDOI
Spin-dependent electronic structure at magnetic surfaces: the low-Miller-index surfaces of nickel
TL;DR: In this paper, the spin-resolved inverse photoemission results on empty electronic states at the low-Miller-index surfaces of nickel as a prototype of a ferromagnetic 3D transition metal are discussed along with photoemissions results on the occupied states.
Journal ArticleDOI
The magnetocrystalline anisotropy of cobalt
TL;DR: In this paper, a very good fit to the K1 data was obtained using a single ion model and the c/a ratio as an adjustable parameter, which gave a satisfactory fit to K2 and also lay within the scatter of the experimentally measured k/a values.
Journal ArticleDOI
Magnetocrystalline anisotropy of ferro- and ferrimagnetics
TL;DR: The phenomenology and atomic origins of magnetocrystalline anisotropy are reviewed in this paper, and experimental data are summarized for the spinel ferrites, garnets, metals of the 3d and 4f transition series, and some selected rare earth compounds.
Journal ArticleDOI
Magnetic properties of carbon‐coated, ferromagnetic nanoparticles produced by a carbon‐arc method
E. M. Brunsman,R.A. Sutton,Eric Bortz,S. Kirkpatrick,K. Midelfort,J. Williams,Pete Smith,Michael E. McHenry,Sara A. Majetich,J. O. Artman,M. De Graef,Stuart W. Staley +11 more
TL;DR: In this paper, the Kratschmer-Huffman carbon-arc method of preparing fullerenes has been used to generate carbon-coated transition metal (TM) and TM-carbide nanocrystallites.
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