Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 32, Issue 48, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/aba921
Keywords
approximants; magnetism; spin glass; antiferromagnetism; magnesium alloys
Categories
Funding
- Japan Society for the Promotion of Science [JP19H05819, JP17K18744, JP19H01834, JP19K21839, JP19H05824, JP19K03709, JP18K13987]
- research program 'dynamic alliance for open innovation bridging human, environment, and materials'
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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 (AFM) to spin-glass (SG)-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 Cd(4)tetrahedron atT> 100 K. The possible origins of this phenomenon were discussed in detail. The occurrence of the AFM to SG-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 Cd(4)tetrahedra.
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