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Electron spin resonance study of Na_(1-x)Li_xV₂O₅

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arxiv cond-mat/9908046 v1 pith:ZGH22YPQ submitted 1999-08-03 cond-mat.str-el

Electron spin resonance study of Na_(1-x)Li_xV₂O₅

M. Lohmann , H.-A. Krug von Nidda , A. Loidl , E. Morre , M. Dischner , C. Geibel This is my paper
classification cond-mat.str-el
keywords lithiumtransitiondopingenergyfoundphaseresonancespin
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We measured X-band electron-spin resonance of single crystalline sodium vanadate doped with lithium, Na_{1-x}Li_xV_2O_5 for 0 < x < 1.3% . The phase transition into a dimerized phase that is observed at 34 K in the undoped compound, was found to be strongly suppressed upon doping with lithium. The spin susceptibility was analyzed to determine the transition temperature and the energy gap with respect to the lithium content. The transition temperature Tsp is suppressed following a square dependence of the lithium concentration while the energy gap is found to decrease linearly. At high temperatures (T>Tsp) the susceptibility remains nearly independent of doping.

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