High-field magnetization and high-frequency ESR study on the tetranuclear cluster composed of π-electrons (S= 1/2 ) and d-electrons (S=5/2)

Yuji Inagaki, Takayuki Asano, Yoshitami Ajiro, Tatsuya Kawae, Kazuyoshi Takeda, Hiroyuki Nojiri, Mitsuhiro Motokawa, Hiroyuki Mitamura, Tsyneaki Goto, Megumi Tanaka, Kenji Matsuda, Hiizu Iwamura

Research output: Contribution to journalConference article

Abstract

Recently, Iwamura's group has succeeded in synthesizing the interesting new tetranuclear cluster composed of two paramagnetic Mn2+ ions (S=5/2 per ion) and two organic free radicals (S= 1/2 per radical) as bridging ligand, [{Mn(hfac)2}2(bnn)] (bnn=2,2′-bis[(1-oxyl-3-oxide-4,4,5,5-tetramethyl- imidazolinyl)]). The crystal structure is triclinic (space group P1) and each cluster is composed of two triangles which share their own base like a 'butterfly'. There are two kind of exchange pathways within the cluster and both of them are likely to be antiferromagnetic. Therefore, spin frustration may occur and we expect many possible ground states with different total spins (ST=0 to ST=6), depending on the relevant interactions and magnetic field. We wish to discuss the important magnetic parameters such as exchange interactions and anisotropy which characterize this interesting system through measurements of high-field magnetization and high-frequency electron spin resonance.

Original languageEnglish
Pages (from-to)433/115 - 438/120
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume343
Publication statusPublished - Jan 1 2000
EventProceedings of the International Symposium Molecular Design and Funtionalities of Assambled Metals Complexes (AMC'99) - Kyoto, Jpn
Duration: Nov 30 1999Dec 2 1999

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Paramagnetic resonance
Magnetization
Ions
magnetization
Electrons
Exchange interactions
Free radicals
Oxides
Ground state
Free Radicals
Anisotropy
electrons
Crystal structure
Ligands
frustration
Magnetic fields
triangles
free radicals
electron paramagnetic resonance
ions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

High-field magnetization and high-frequency ESR study on the tetranuclear cluster composed of π-electrons (S= 1/2 ) and d-electrons (S=5/2). / Inagaki, Yuji; Asano, Takayuki; Ajiro, Yoshitami; Kawae, Tatsuya; Takeda, Kazuyoshi; Nojiri, Hiroyuki; Motokawa, Mitsuhiro; Mitamura, Hiroyuki; Goto, Tsyneaki; Tanaka, Megumi; Matsuda, Kenji; Iwamura, Hiizu.

In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 343, 01.01.2000, p. 433/115 - 438/120.

Research output: Contribution to journalConference article

Inagaki, Yuji ; Asano, Takayuki ; Ajiro, Yoshitami ; Kawae, Tatsuya ; Takeda, Kazuyoshi ; Nojiri, Hiroyuki ; Motokawa, Mitsuhiro ; Mitamura, Hiroyuki ; Goto, Tsyneaki ; Tanaka, Megumi ; Matsuda, Kenji ; Iwamura, Hiizu. / High-field magnetization and high-frequency ESR study on the tetranuclear cluster composed of π-electrons (S= 1/2 ) and d-electrons (S=5/2). In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals. 2000 ; Vol. 343. pp. 433/115 - 438/120.
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T1 - High-field magnetization and high-frequency ESR study on the tetranuclear cluster composed of π-electrons (S= 1/2 ) and d-electrons (S=5/2)

AU - Inagaki, Yuji

AU - Asano, Takayuki

AU - Ajiro, Yoshitami

AU - Kawae, Tatsuya

AU - Takeda, Kazuyoshi

AU - Nojiri, Hiroyuki

AU - Motokawa, Mitsuhiro

AU - Mitamura, Hiroyuki

AU - Goto, Tsyneaki

AU - Tanaka, Megumi

AU - Matsuda, Kenji

AU - Iwamura, Hiizu

PY - 2000/1/1

Y1 - 2000/1/1

N2 - Recently, Iwamura's group has succeeded in synthesizing the interesting new tetranuclear cluster composed of two paramagnetic Mn2+ ions (S=5/2 per ion) and two organic free radicals (S= 1/2 per radical) as bridging ligand, [{Mn(hfac)2}2(bnn)] (bnn=2,2′-bis[(1-oxyl-3-oxide-4,4,5,5-tetramethyl- imidazolinyl)]). The crystal structure is triclinic (space group P1) and each cluster is composed of two triangles which share their own base like a 'butterfly'. There are two kind of exchange pathways within the cluster and both of them are likely to be antiferromagnetic. Therefore, spin frustration may occur and we expect many possible ground states with different total spins (ST=0 to ST=6), depending on the relevant interactions and magnetic field. We wish to discuss the important magnetic parameters such as exchange interactions and anisotropy which characterize this interesting system through measurements of high-field magnetization and high-frequency electron spin resonance.

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