Magnetic properties of amorphous rare-earth alloys
Magnetic properties of amorphous rare-earth alloys
The magnetic properties of three amorphous rare-earth alloy systems have been studied in some detail. The first measurements were made on the binary system GdxAg100-x with 28 ≤x ≤ 40. These alloys are ferromagnetic for x ≥ 28. In order to study the evolution of magnetic order as a function of Gd content it was necessary to go to a ternary alloy in which the glass forming properties are independent of the Gd content. The alloy system GdxY63-xCu37 was found to satisfy these requirements. These alloys are ferromagnetic for x ≥ 45 and show spin glass behaviour for x < 30. In the composition range 30 < x < 45 the nature of the ordered phase is not clear and the possibility of a mixture of two phases cannot be excluded. Finally inelastic neutron scattering was used to search for crystal field levels in amorphous R_5Y_58Cu_37 alloys in which R = Ce,Pr,Tb,Dy,Ho and Er. One of these, Er_5Y_58Cu_37, showed evidence of well defined crystal field levels despite the structural disorder. The results are discussed within the non-axial crystal field model. (D71906/87)
University of Southampton
1986
Samadian, Vahab
(1986)
Magnetic properties of amorphous rare-earth alloys.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The magnetic properties of three amorphous rare-earth alloy systems have been studied in some detail. The first measurements were made on the binary system GdxAg100-x with 28 ≤x ≤ 40. These alloys are ferromagnetic for x ≥ 28. In order to study the evolution of magnetic order as a function of Gd content it was necessary to go to a ternary alloy in which the glass forming properties are independent of the Gd content. The alloy system GdxY63-xCu37 was found to satisfy these requirements. These alloys are ferromagnetic for x ≥ 45 and show spin glass behaviour for x < 30. In the composition range 30 < x < 45 the nature of the ordered phase is not clear and the possibility of a mixture of two phases cannot be excluded. Finally inelastic neutron scattering was used to search for crystal field levels in amorphous R_5Y_58Cu_37 alloys in which R = Ce,Pr,Tb,Dy,Ho and Er. One of these, Er_5Y_58Cu_37, showed evidence of well defined crystal field levels despite the structural disorder. The results are discussed within the non-axial crystal field model. (D71906/87)
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Published date: 1986
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Local EPrints ID: 460762
URI: http://eprints.soton.ac.uk/id/eprint/460762
PURE UUID: 0c2bca49-8809-48fe-9265-25ee6b40cd32
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Date deposited: 04 Jul 2022 18:29
Last modified: 04 Jul 2022 18:29
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Author:
Vahab Samadian
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