Magnetic behavior of the nanophase of Yb[Ni.sub.2] alloys

Variations in magnetic properties of the heavy-fermion Yb[Ni.sub.2] alloy when milled in a high energy ball milling system have been investigated. The ferromagnetic transition ([T.sub.C] = 10.4 K) in the initial sample almost vanishes after milling, which leads to the appearance of a magnetic transi...

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Bibliographic Details
Published in:Physics of metals and metallography 2017-04, Vol.118 (4), p.341
Main Authors: Ivanshin, V.A, Gataullin, E.M, Sukhanov, A.A, Ivanshin, N.A, Rojas, D.P, Barquin, L. Fernandez
Format: Article
Language:English
Subjects:
Alloys
Comparative analysis
Ferromagnetism
Magnetic properties
Metals (Materials)
Specialty metals industry
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Summary:Variations in magnetic properties of the heavy-fermion Yb[Ni.sub.2] alloy when milled in a high energy ball milling system have been investigated. The ferromagnetic transition ([T.sub.C] = 10.4 K) in the initial sample almost vanishes after milling, which leads to the appearance of a magnetic transition at [T.sup.*] = 3.2 K in nanocrystallites. Before milling, processes of spin-lattice relaxation of the Orbach-Aminov type with the participation of the first excited Stark sublevel of the [Yb.sup.3+] ion located at 75 K are dominating in the electron spin dynamics in the paramagnetic phase of the alloy. A comparative study of the temperature dependence of the magnetic properties and spectra of electron paramagnetic resonance in poly- and nanocrystalline samples indicates the existence of a magnetic inhomogeneity of the compound arising upon milling. Keywords: heavy fermions, magnetic susceptibility, electron paramagnetic resonance, nanocrystallites
ISSN:0031-918X
DOI:10.1134/S0031918X17040044