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.
|Pages (from-to)||427/109 - 432/114|
|Journal||Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals|
|Publication status||Published - 2000|
|Event||Proceedings of the International Symposium Molecular Design and Funtionalities of Assambled Metals Complexes (AMC'99) - Kyoto, Jpn|
Duration: 1999 Nov 30 → 1999 Dec 2
ASJC Scopus subject areas
- Condensed Matter Physics