Magnetic ordering and local random anisotropy in dilute magnetic glasses

MAGNETIC ORDERING IN DILUTE YTb AND YEr ALLOYS

Dilute YEr alloys show the existence of sinusoidaily modulated antiferromagnetism down to the lowest impurity concentrations studied. Extrapolation of the Ndel temperatures for both YEr and YTb suggests a critical concentration is 0.8 % Tb, Er. Ordering in such dilute alloys may result from exchange enhancement in the yttrium host. Following our earlier study of YTb alloys [I], we der contamina...

Tunable exchange bias in dilute magnetic alloys – chiral spin glasses

A unidirectional anisotropy appears in field cooled samples of dilute magnetic alloys at temperatures well below the cusp temperature of the zero field cooled magnetization curve. Magnetization measurements on a Cu(13.5 at% Mn) sample show that this anisotropy is essentially temperature independent and acts on a temperature dependent excess magnetization, ΔM. The anisotropy can be partially or ...

Temperature-dependent orbital-moment anisotropy in dilute magnetic oxides

magnetic resonance imaging in dentistry

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Magnetic behavior of ferromagnets with random anisotropy

This article reports on a magnetometric study of the effects of diluted local random anisotropy in a ferromagnetic FegoB20 amorphous matrix. In the low-temperature and low-field regime the samples, Fe74RE6B20 (RE = Nd, Ce), show a very rich behavior as a consequence of the competition between, and different dependence on T, of the correlation length associated with local random anisotropy and e...