FIR-magnetospectroscopy on molecular magnets

H. Nojiri, H. Hachisuka, K. Awaga, P. Kögerler, M. Luban, A. L. Barra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

FIR-magnetospectroscopy has been performed on nano-scale molecular magnets to study their spin Hamiltonian parameters and symmetries. The first case is the characterization of high spin molecule Mn11Crac[Mn 11Cr(O2CCH3)16(H2O) 4]·4H2O)] with ferromagnetic ground state, which is made by Cr doping into the most famous ferromagnetic cluster Mn12ac with S=10 ground state. We found that Mn11Crac is the spin-odd cluster(S=19/2) and that the anisotropy parameter is nearly identical to that of Mn12ac. A comparative study of those clusters is very useful to explore spin parity effect in quantum tunnelling. As the second example, we investigate a four-spinring with singlet ground state. We observed forbidden transitions between the ground state and the excited states, which uncovers the nature of the tunnelling gaps caused by the mixing among the quantized levels.

Original languageEnglish
Title of host publicationConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics
EditorsM. Thumm, W. Wiesbeck
Pages127-128
Number of pages2
Publication statusPublished - 2004 Dec 1
EventConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics - Karlsruhe, Germany
Duration: 2004 Sep 272004 Oct 1

Publication series

NameConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics

Other

OtherConference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics
CountryGermany
CityKarlsruhe
Period04/9/2704/10/1

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Nojiri, H., Hachisuka, H., Awaga, K., Kögerler, P., Luban, M., & Barra, A. L. (2004). FIR-magnetospectroscopy on molecular magnets. In M. Thumm, & W. Wiesbeck (Eds.), Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics (pp. 127-128). (Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics).