Electron spin resonance study of spin relaxation in the strong-leg spin ladder with nonmagnetic dilution

We have studied electron spin resonance (ESR) absorption spectra for the nonmagnetically diluted strong-leg spin ladder magnet ({C}\(_{7}\)H\(_{10}\)N)\(_{2}\)Cu\(_{(1-x)}\)Zn\(_{x}\)Br\(_{4}\) (abbreviated as DIMPY) down to 450 mK. Formation of the clusters with non-zero net magnetization is confir...

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Bibliographic Details
Published in:arXiv.org 2019-11
Main Authors: Krasnikova, Yu V, Glazkov, V N, Ponomaryov, A, Zvyagin, S A, K Yu Povarov, Galeski, S, Zheludev, A
Format: Article
Language:English
Subjects:
Absorption spectra
Clusters
Dependence
Dilution
Electron paramagnetic resonance
Electron spin
Electrons
High temperature
Relaxation time
Spin resonance
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Summary:We have studied electron spin resonance (ESR) absorption spectra for the nonmagnetically diluted strong-leg spin ladder magnet ({C}\(_{7}\)H\(_{10}\)N)\(_{2}\)Cu\(_{(1-x)}\)Zn\(_{x}\)Br\(_{4}\) (abbreviated as DIMPY) down to 450 mK. Formation of the clusters with non-zero net magnetization is confirmed; the cluster-cluster interaction is evidenced by the concentration dependence of ESR absorption. High-temperature spin-relaxation time was found to increase with non-magnetic dilution. The ESR linewidth analysis proves that the Dzyaloshinskii-Moriya (DM) interaction remains the dominant spin-relaxation channel in diluted DIMPY. Experimental data indicate that the dilution results in the weakening of the effective DM interaction, which can be interpreted as total suppression of DM interaction in the close vicinity of impurity atom.
ISSN:2331-8422
DOI:10.48550/arxiv.1907.02284