Structural-transition-driven antiferromagnetic to spin-glass transition in Cd-Mg-Tb 1/1 approximants

The magnetic susceptibility of the 1/1 approximants to icosahedral quasicrystals in a series of Cd85-xMgxTb15 (x = 5, 10, 15, 20) alloys was investigated in detail. The occurrence of antiferromagnetic to spin-glass-like transition was noticed by increasing Mg. Transmission electron microscopy analys...

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Bibliographic Details
Published in:arXiv.org 2020-07
Main Authors: Labib, Farid, Okuyama, Daisuke, Fujita, Nobuhisa, Yamada, Tsunetomo, Ohhashi, Satoshi, Morikawa, Daisuke, Tsuda, Kenji, Sato, Taku J, An-Pang, Tsai
Format: Article
Language:English
Subjects:
Antiferromagnetism
Approximants
Cadmium
Correlation analysis
Glass transition
Icosahedral phase
Magnetic permeability
Magnetic transitions
Quasicrystals
Spin glasses
Superlattices
Tetrahedra
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Summary:The magnetic susceptibility of the 1/1 approximants to icosahedral quasicrystals in a series of Cd85-xMgxTb15 (x = 5, 10, 15, 20) alloys was investigated in detail. The occurrence of antiferromagnetic to spin-glass-like transition was noticed by increasing Mg. Transmission electron microscopy analysis evidenced a correlation between the magnetic transition and suppression of the monoclinic superlattice ordering with respect to the orientation of the Cd4 tetrahedron at T > 100 K. The possible origins of this phenomenon were discussed in detail. The occurrence of the antiferromagnetic to spin-glass -like magnetic transition is associated with the combination of chemical disorder due to a randomized substitution of Cd with Mg and the orientational disorder of the Cd4 tetrahedra.
ISSN:2331-8422
DOI:10.48550/arxiv.2007.14526