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BaCu_2Si_2O_7: a new quasi 1-dimensional S = 1/2 antiferromagnetic chain system

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arxiv cond-mat/9902251 v1 pith:FRCM3S2R submitted 1999-02-18 cond-mat.str-el

I. Tsukada , Y. Sasago , K. Uchinokura , A. Zheludev , S. Maslov , G. Shirane , K. Kakurai , E. Ressouche This is my paper · ORCID
classification cond-mat.str-el
keywords antiferromagneticbacuchainsobservedbehaviorbelowchaincompound
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The new antiferromagnetic (AF) compound BaCu_2Si_2O_7 is studied by magnetic susceptibility and neutron scattering techniques. The observed behavior is dominated by the presence of loosely coupled S=1/2 chains with the intrachain AF exchange constant J = 24.1 meV. Long-range Neel ordering is observed below Tn = 9.2 K. The results are discussed within the framework of the Mean Field-RPA model for weakly interacting quantum spin chains.

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