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Magnetic properties of the low dimensional spin system (VO)PO:ESR and susceptibility |
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| Authors: | AV Prokofiev F Büllesfeld W Assmus H Schwenk D Wichert U Löw B Lüthi |
| Institution: | Physikalisches Institut, Universit?t Frankfurt, Robert Mayer Strasse 2-4, 60054 Frankfurt, Germany, DE |
| 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 . Furthermore we find a spin gap of meV from our ESR measurements. Using elastic constants no indication of a phase transition forcing the dimerization is seen below 300 K. Received: 22 December 1997 / Accepted: 17 March 1998 |
| Keywords: | 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 ) |
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