Issue 12, 2021

Tb-based silicate apatites showing slow magnetization relaxation with identical parameters for the Tb3+ and Dy3+ counter ions

Abstract

Tb-diluted and Tb-rich apatite-type silicates with compositions Y7.75Tb0.25Ca2(SiO4)6O2 and Tb8Ca2(SiO4)6O2, respectively, exhibit field induced multiple slow relaxation of magnetization. The former reveals two slow relaxation paths, the latter only one with a longer relaxation time of several seconds. The relaxation features of the Tb-diluted one are comparable with those of analogue compounds, where Tb is replaced by Dy, as well as with those of a Tb-doped calcium phosphate apatite. The relaxation parameters of the Tb-rich compound virtually match those of the Dy-based analogue Dy8Ca2(SiO4)6O2. The latter represents the first instance of independence of magnetization relaxation on the nature of a paramagnetic rare-earth metal ion in single ion magnet like materials.

Graphical abstract: Tb-based silicate apatites showing slow magnetization relaxation with identical parameters for the Tb3+ and Dy3+ counter ions

Supplementary files

Article information

Article type
Paper
Submitted
23 Jan 2021
Accepted
04 Feb 2021
First published
12 Feb 2021
This article is Open Access
Creative Commons BY license

RSC Adv., 2021,11, 6926-6933

Tb-based silicate apatites showing slow magnetization relaxation with identical parameters for the Tb3+ and Dy3+ counter ions

M. A. Zykin, A. K. Dyakonov, A. A. Eliseev, L. A. Trusov, R. K. Kremer, R. E. Dinnebier, M. Jansen and P. E. Kazin, RSC Adv., 2021, 11, 6926 DOI: 10.1039/D1RA00613D

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