NDLI: Ionic size effect on the spin gap nature of SrCu$_{2}$(TeO$_{3}$)$_{2}$Cl$

Content Provider	Springer Nature Link
Author	Chen, S. C. Kuo, C. N. Lue, C. S.
Copyright Year	2013
Abstract	By means of magnetic susceptibility measurements, we report the effects of partial substitution of Br onto the Cl sites of SrCu$_{2}$(TeO$_{3}$)$_{2}$Cl$_{2}$. This material has been a subject of current interest due to indications of a spin gap behavior. However, the magnetic spin couplings responsible for the spin gap nature remain unclear. For each composition of SrCu$_{2}$(TeO$_{3}$)$_{2}$(Cl$_{1−x }$Br$_{ x }$)$_{2}$, the temperature-dependent susceptibility exhibits a character of low-dimensional magnetism with a broad maximum at T $_{ max }$. The magnitude of T $_{ max }$ slightly shifts to higher temperatures with increasing Br concentration. The experimental data can be well fitted to a coupled spin dimer model, yielding an increasing trend for the spin gap size from 172 to 188 K. This indicates that the substitution of Br ions has the effect of reducing the distance between Cu(1) and Cu(2) ions, leading to a stronger antiferromagnetic spin interaction. On the other hand, the variation of the interdimer coupling is marginal, indicative of substituting Br ions having little effect on the distance changes of Cu(1)-Cu(1) and Cu(2)-Cu(2) in SrCu$_{2}$(TeO$_{3}$)$_{2}$Cl$_{2}$.
Starting Page	1893
Ending Page	1895
Page Count	3
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	62
Issue Number	12
e-ISSN	19768524
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-07-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spin chain model Theoretical, Mathematical and Computational Physics Physics Particle and Nuclear Physics Magnetic susceptibility
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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