Spin dynamics in the two-dimensional spin system SrCu2(BO3)2

A. Fukaya; Y. Fudamoto; I. M. Gat; T. Ito; M. I. Larkin; A. T. Savici; Y. J. Uemura; P. P. Kyriakou; G. M. Luke; M. T. Rovers; H. Kageyama; Y. Ueda

doi:10.1016/S0921-4526(02)01659-9

Spin dynamics in the two-dimensional spin system SrCu₂(BO₃)₂

A. Fukaya, Y. Fudamoto, I. M. Gat, T. Ito, M. I. Larkin, A. T. Savici, Y. J. Uemura, P. P. Kyriakou, G. M. Luke, M. T. Rovers, H. Kageyama, Y. Ueda

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Muon spin relaxation measurements have been performed in the two dimensional spin system SrCu₂(BO₃)₂. As the temperature decreases, the relaxation rate increases below T = 10 K, and shows a saturation below T = 3 K. The line shape at low temperatures is nearly Gaussian, yet it cannot be easily decoupled by an application of longitudinal field. These results indicate the existence of magnetically active spins that show slowing down of fluctuations with decreasing temperatures, yet remain dynamic even at 0.1 K. We have also examined a sample doped with small amount of non-magnetic Zn²⁺ impurity, Sr(Cu_0.99Zn_0.01)₂(BO₃)₂. The result was quite similar to the pure sample. Thus, anomalous behavior of the pure sample observed in low temperatures is not due to magnetic moments induced by impurities or a lattice defect.

Original language	English
Pages (from-to)	446-449
Number of pages	4
Journal	Physica B: Physics of Condensed Matter
Volume	326
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4526(02)01659-9
State	Published - Feb 2003
Externally published	Yes

Funding

One of the authors (A.F.) was supported by JPSJ Postdoctoral Fellowships for Research Abroad. Work at Columbia was supported by National Science Foundation, DMR 01-02752 and DMR 98-02000.

Keywords

Dimer
Spin singlet ground state
SrCu(BO)
Two dimensional system

Access to Document

10.1016/S0921-4526(02)01659-9

Cite this

@article{69bab0ecb7054453a58d56d13549aea3,

title = "Spin dynamics in the two-dimensional spin system SrCu2(BO3)2",

abstract = "Muon spin relaxation measurements have been performed in the two dimensional spin system SrCu2(BO3)2. As the temperature decreases, the relaxation rate increases below T = 10 K, and shows a saturation below T = 3 K. The line shape at low temperatures is nearly Gaussian, yet it cannot be easily decoupled by an application of longitudinal field. These results indicate the existence of magnetically active spins that show slowing down of fluctuations with decreasing temperatures, yet remain dynamic even at 0.1 K. We have also examined a sample doped with small amount of non-magnetic Zn2+ impurity, Sr(Cu0.99Zn0.01)2(BO3)2. The result was quite similar to the pure sample. Thus, anomalous behavior of the pure sample observed in low temperatures is not due to magnetic moments induced by impurities or a lattice defect.",

keywords = "Dimer, Spin singlet ground state, SrCu(BO), Two dimensional system",

author = "A. Fukaya and Y. Fudamoto and Gat, {I. M.} and T. Ito and Larkin, {M. I.} and Savici, {A. T.} and Uemura, {Y. J.} and Kyriakou, {P. P.} and Luke, {G. M.} and Rovers, {M. T.} and H. Kageyama and Y. Ueda",

year = "2003",

month = feb,

doi = "10.1016/S0921-4526(02)01659-9",

language = "English",

volume = "326",

pages = "446--449",

journal = "Physica B: Physics of Condensed Matter",

issn = "0921-4526",

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TY - JOUR

T1 - Spin dynamics in the two-dimensional spin system SrCu2(BO3)2

AU - Fukaya, A.

AU - Fudamoto, Y.

AU - Gat, I. M.

AU - Ito, T.

AU - Larkin, M. I.

AU - Savici, A. T.

AU - Uemura, Y. J.

AU - Kyriakou, P. P.

AU - Luke, G. M.

AU - Rovers, M. T.

AU - Kageyama, H.

AU - Ueda, Y.

PY - 2003/2

Y1 - 2003/2

N2 - Muon spin relaxation measurements have been performed in the two dimensional spin system SrCu2(BO3)2. As the temperature decreases, the relaxation rate increases below T = 10 K, and shows a saturation below T = 3 K. The line shape at low temperatures is nearly Gaussian, yet it cannot be easily decoupled by an application of longitudinal field. These results indicate the existence of magnetically active spins that show slowing down of fluctuations with decreasing temperatures, yet remain dynamic even at 0.1 K. We have also examined a sample doped with small amount of non-magnetic Zn2+ impurity, Sr(Cu0.99Zn0.01)2(BO3)2. The result was quite similar to the pure sample. Thus, anomalous behavior of the pure sample observed in low temperatures is not due to magnetic moments induced by impurities or a lattice defect.

AB - Muon spin relaxation measurements have been performed in the two dimensional spin system SrCu2(BO3)2. As the temperature decreases, the relaxation rate increases below T = 10 K, and shows a saturation below T = 3 K. The line shape at low temperatures is nearly Gaussian, yet it cannot be easily decoupled by an application of longitudinal field. These results indicate the existence of magnetically active spins that show slowing down of fluctuations with decreasing temperatures, yet remain dynamic even at 0.1 K. We have also examined a sample doped with small amount of non-magnetic Zn2+ impurity, Sr(Cu0.99Zn0.01)2(BO3)2. The result was quite similar to the pure sample. Thus, anomalous behavior of the pure sample observed in low temperatures is not due to magnetic moments induced by impurities or a lattice defect.

KW - Dimer

KW - Spin singlet ground state

KW - SrCu(BO)

KW - Two dimensional system

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DO - 10.1016/S0921-4526(02)01659-9

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JO - Physica B: Physics of Condensed Matter

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