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Review of NMR studies of nanoscale molecular magnets composed of geometrically frustrated antiferromagnetic triangles

TitleReview of NMR studies of nanoscale molecular magnets composed of geometrically frustrated antiferromagnetic triangles
Publication TypeJournal Article
Year of Publication2016
AuthorsFurukawa, Y
JournalInternational Journal of Nanotechnology
Volume13
Pagination845-869
Date Published11
Type of ArticleArticle
ISBN Number1475-7435
Accession NumberWOS:000391051500013
Keywordsantiferromagnetic traingles, cluster v-15, disorder, dynamics, excitations, frustrated spin systems, lattice antiferromagnet, magnetization, Materials Science, nanomagnets, nuclear magnetic resonance, nuclear spin lattice relaxation rates, quantum spin liquid, spin, state, Technology - Other Topics, transitions, triangular-lattice
Abstract

round state. Possible origins for the peculiar behaviour of 1/T-1 will be discussed in terms of magnetic fluctuations due to spin frustrations. In Fe30, static and dynamical properties of Fe3+ (s = 5/2) have been investigated by proton NMR spectra and 1/T-1 measurements. From the temperature dependence of 1/T-1, the fluctuation frequency of the Fe3+ spins is found to decrease with decreasing temperature, indicating spin freezing at low temperatures. The spin freezing is also evidenced by the observation of a sudden broadening of H-1 NMR spectra below 0.6 K. Finally, H-1 NMR data in Cu3 will be described. An observation of magnetic broadening of H-1 NMR spectra at low temperatures below 1 K directly revealed a gapless ground state. The 1/T-1 measurements revealed a usual slow spin dynamics in the Cu3 spin tube.

DOI10.1504/ijnt.2016.080351
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Complex States

Short TitleInt. J. Nanotechnol.
Alternate JournalInt. J. Nanotechnol.