High-field magnetization process in free radical and metal-assembled molecular magnets

T. Asano, Y. Inagaki, Y. Ajiro, H. Matsubara, K. Mukai, N. Matsumoto, H. Mitamura, T. Goto, Y. Narumi, K. Kindo, H. Hori

Research output: Contribution to journalConference articlepeer-review

Abstract

We applied the high-field technique to study the magnetization process in model substances. Measurements have been performed on the powder samples under a pulsed magnetic field up to 50 T. A family of organic verdazyl radical is a candidate of an isotropic S = 1/2 antiferromagnetic linear chain model. The observed magnetization is practically zero up to a certain critical field around 40 T and steeply increases to the saturation value of 1 μB/molecule. The feature cannot be explained by the uniform chain model but agrees with the alternation linear chain model closed to the dimer model in which the ground state is a nonmagnetic singlet with an energy gap between the excited triplet state. Metal-assembled tetranuclear complexes [Mn(MeOH)L(OH)M(bpy)]2 represent a prototype of geometrically frustrated spin systems. We observed a step-like magnetization process which clearly shows the successive transitions among quantum states with different total spins.

Original languageEnglish
Pages (from-to)427/109 - 432/114
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume343
Publication statusPublished - 2000
EventProceedings of the International Symposium Molecular Design and Funtionalities of Assambled Metals Complexes (AMC'99) - Kyoto, Jpn
Duration: Nov 30 1999Dec 2 1999

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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