Magnetic properties and crystal structure of solvent-free Sc@C82 metallofullerene microcrystals

Yasuhiro Ito; Wataru Fujita; Toshiya Okazaki; Toshiki Sugai; Kunio Awaga; Eiji Nishibori; Masaki Takata; Makoto Sakata; Hisanori Shinohara

doi:10.1002/cphc.200700097

Magnetic properties and crystal structure of solvent-free Sc@C₈₂ metallofullerene microcrystals

Yasuhiro Ito, Wataru Fujita, Toshiya Okazaki, Toshiki Sugai, Kunio Awaga, Eiji Nishibori, Masaki Takata, Makoto Sakata, Hisanori Shinohara

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

Magnetic properties of solvent-free crystals of the endohedral Sc@C ₈₂ are investigated by SQUID and X-ray powder diffraction. We find that the crystal is a paramagnet and the magnetic susceptibility decreases from 150 K with evidence of antiferromagnetic-like interactions by slow cooling. X-ray crystal analysis reveals the presence of a phase transition at 150 K, which is attributed to an orientational ordering transition of the fullerene molecules. At low temperatures we find a magnetic metastable state that can be controlled by the cooling rate. The metastable state can be formed by rapid cooling. The direction of Sc@C₈₂ molecular axis in the crystals is disordered in the metastable state, and the susceptibility is higher than that in the slow cooling case at low temperature.

Original language	English
Pages (from-to)	1019-1024
Number of pages	6
Journal	ChemPhysChem
Volume	8
Issue number	7
DOIs	https://doi.org/10.1002/cphc.200700097
Publication status	Published - 2007 May 14
Externally published	Yes

Keywords

Magnetic properties
Metallofullerenes
Phase
Scandium
Transitions
X-ray diffraction

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Physical and Theoretical Chemistry

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Magnetic properties and crystal structure of solvent-free Sc@C₈₂ metallofullerene microcrystals. / Ito, Yasuhiro; Fujita, Wataru; Okazaki, Toshiya; Sugai, Toshiki; Awaga, Kunio; Nishibori, Eiji; Takata, Masaki; Sakata, Makoto; Shinohara, Hisanori.

In: ChemPhysChem, Vol. 8, No. 7, 14.05.2007, p. 1019-1024.

Research output: Contribution to journal › Article › peer-review

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abstract = "Magnetic properties of solvent-free crystals of the endohedral Sc@C 82 are investigated by SQUID and X-ray powder diffraction. We find that the crystal is a paramagnet and the magnetic susceptibility decreases from 150 K with evidence of antiferromagnetic-like interactions by slow cooling. X-ray crystal analysis reveals the presence of a phase transition at 150 K, which is attributed to an orientational ordering transition of the fullerene molecules. At low temperatures we find a magnetic metastable state that can be controlled by the cooling rate. The metastable state can be formed by rapid cooling. The direction of Sc@C82 molecular axis in the crystals is disordered in the metastable state, and the susceptibility is higher than that in the slow cooling case at low temperature.",

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AU - Ito, Yasuhiro

AU - Fujita, Wataru

AU - Okazaki, Toshiya

AU - Sugai, Toshiki

AU - Awaga, Kunio

AU - Nishibori, Eiji

AU - Takata, Masaki

AU - Sakata, Makoto

AU - Shinohara, Hisanori

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AB - Magnetic properties of solvent-free crystals of the endohedral Sc@C 82 are investigated by SQUID and X-ray powder diffraction. We find that the crystal is a paramagnet and the magnetic susceptibility decreases from 150 K with evidence of antiferromagnetic-like interactions by slow cooling. X-ray crystal analysis reveals the presence of a phase transition at 150 K, which is attributed to an orientational ordering transition of the fullerene molecules. At low temperatures we find a magnetic metastable state that can be controlled by the cooling rate. The metastable state can be formed by rapid cooling. The direction of Sc@C82 molecular axis in the crystals is disordered in the metastable state, and the susceptibility is higher than that in the slow cooling case at low temperature.

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