Determination of exchange energies in the sawtooth spin ring {Mo75V20} by ESR

Oshima, Y.; Nojiri, H.; Schnack, J.; Luban, M.; Kögerler, P.

doi:10.1103/PhysRevB.85.024413

Journal Article

PreJuSER-22304

Determination of exchange energies in the sawtooth spin ring {Mo75V20} by ESR

Oshima, Y. ; Nojiri, H. ; Schnack, J. ; Kögerler, P.FZJ* ; Luban, M.

2012
APS College Park, Md.

Physical review / B 85(2), 024413 (2012) [10.1103/PhysRevB.85.024413]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10851 doi:10.1103/PhysRevB.85.024413

Abstract: The magnetism of the polyoxometalate cluster {Mo75V20}, containing a sawtooth ring of 10 corner-sharing triangles located on the equator of the barrel-shaped molecule, has remained debatable since it is masked by contributions from impurities as well as temperature-independent paramagnetism. In this paper, we demonstrate the usefulness of electron spin resonance (ESR) measurements, since the temperature dependence of the ESR intensity can discriminate between impurity and molecular contributions. We determine the exchange parameters and therefore also the low-lying spectrum of {Mo75V20},

Keyword(s): J

Classification:

Physics, Condensed Matter

Note: This work was supported by the Deutsche Forschungsgemeinschaft through the Research Unit 945. Ames Laboratory is operated for the US Department of Energy by Iowa State University under Contract No. W-7405-Eng-82. H.N. acknowledges the support by Grant-in-Aid for Scientific Research on Priority Areas (No. 13130204) and Scientific Research on Innovative Areas "Coordination Program" (No. 22108504) from MEXT, Japan and by the Shimazu Science Foundation. J.S. acknowledges the support from ICC-IMR.

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