Springer LINK: The European Physical Journal B - Abstract Volume 5 Issue 3 (1998) pp 313-316

The European Physical Journal B

ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)

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Abstract Volume 5 Issue 3 (1998) pp 313-316

Magnetic properties of the low dimensional spin system (VO)$_{\mathsf 2}$P$_{\mathsf 2}$O$_{\mathsf 7}$:ESR and susceptibility

A.V. Prokofiev, F. Büllesfeld, W. Assmus, H. Schwenk (a), D. Wichert, U. Löw, B. Lüthi

Physikalisches Institut, Universität Frankfurt, Robert Mayer Strasse 2-4, 60054 Frankfurt, Germany

Received: 22 December 1997 / Accepted: 17 March 1998

Abstract: Experimental results on magnetic resonance (ESR) and magnetic susceptibility are given for single crystalline (VO)₂P₂O₇. The crystal growth procedure is briefly discussed. The susceptibility is interpreted numerically using a model with alternating spin chains. We determine J=51 K and $\delta =0.2$. Furthermore we find a spin gap of $\approx 6$ meV from our ESR measurements. Using elastic constants no indication of a phase transition forcing the dimerization is seen below 300 K.

PACS. 75.10.Jm Quantized spin models - 76.30.-v Electron paramagnetic resonance and relaxation - 75.40.Cx Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)

(a) email: schwenk@physik.uni-frankfurt.de

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