Ferromagnetism in germanium clathrate: Ba8Mn2Ge44

Tetsuji Kawaguchi; Katsumi Tanigaki; Masahiro Yasukawa

doi:10.1063/1.1328048

Ferromagnetism in germanium clathrate: Ba₈Mn₂Ge₄₄

Tetsuji Kawaguchi, Katsumi Tanigaki, Masahiro Yasukawa

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

44 Citations (Scopus)

Abstract

A unique magnetic nanosystem, constructed from Ge₂₀ dodecahedrons and Mn, is presented, which shows a ferromagnetic transition around 10 K. In this system with the formula Ba₈Mn_xGe_46-x (x = 1-2), the Mn atoms can be incorporated with accurate control in position of the crystal lattice. The spontaneous magnetization is approximately linearly proportional to the amount of Mn introduced and is maximized at x = 2. Magnetic measurements reveal that the d electrons are almost localized on Mn atoms but also affected by conduction electrons spreading over the clathrate network.

Original language	English
Pages (from-to)	3438-3440
Number of pages	3
Journal	Applied Physics Letters
Volume	77
Issue number	21
DOIs	https://doi.org/10.1063/1.1328048
Publication status	Published - 2000 Nov 20
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "A unique magnetic nanosystem, constructed from Ge20 dodecahedrons and Mn, is presented, which shows a ferromagnetic transition around 10 K. In this system with the formula Ba8MnxGe46-x (x = 1-2), the Mn atoms can be incorporated with accurate control in position of the crystal lattice. The spontaneous magnetization is approximately linearly proportional to the amount of Mn introduced and is maximized at x = 2. Magnetic measurements reveal that the d electrons are almost localized on Mn atoms but also affected by conduction electrons spreading over the clathrate network.",

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PY - 2000/11/20

Y1 - 2000/11/20

N2 - A unique magnetic nanosystem, constructed from Ge20 dodecahedrons and Mn, is presented, which shows a ferromagnetic transition around 10 K. In this system with the formula Ba8MnxGe46-x (x = 1-2), the Mn atoms can be incorporated with accurate control in position of the crystal lattice. The spontaneous magnetization is approximately linearly proportional to the amount of Mn introduced and is maximized at x = 2. Magnetic measurements reveal that the d electrons are almost localized on Mn atoms but also affected by conduction electrons spreading over the clathrate network.

AB - A unique magnetic nanosystem, constructed from Ge20 dodecahedrons and Mn, is presented, which shows a ferromagnetic transition around 10 K. In this system with the formula Ba8MnxGe46-x (x = 1-2), the Mn atoms can be incorporated with accurate control in position of the crystal lattice. The spontaneous magnetization is approximately linearly proportional to the amount of Mn introduced and is maximized at x = 2. Magnetic measurements reveal that the d electrons are almost localized on Mn atoms but also affected by conduction electrons spreading over the clathrate network.

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