Charge dynamics and possibility of ferromagnetism in A1-xLaxB6 (A=Ca and Sr)

K. Taniguchi, Takuro Katsufuji, F. Sakai, H. Ueda, K. Kitazawa, H. Takagi

研究成果: Article

21 引用 (Scopus)

抄録

Ferromagnetism was recently reported in La-doped alkaline-earth hexaborides A1-xLaxB6 (A = Ca, Sr, and Ba). We have performed reflectivity, Hall resistivity, and magnetization measurements of A1-xLaxB6. The results indicate that A1-xLaxB6 can be regarded as a simple doped semimetal, with no signature of an excitonic state as suggested by several theories. It is also found that the surface of as-grown samples (∼ 10 μm in thickness) has a different electronic structure from a bulk one, and a fairly large number of paramagnetic moments are confined in this region. After eliminating these paramagnetic moments at the surface, we could not find any evidence of an intrinsic ferromagnetic moment in our samples, implying the possibility that the ferromagnetism of A1-xLaxB6 reported so far is not intrinsic.

元の言語English
記事番号064407
ページ(範囲)644071-644077
ページ数7
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
66
発行部数6
出版物ステータスPublished - 2002 8 1
外部発表Yes

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Ferromagnetism
ferromagnetism
moments
Metalloids
Electronic structure
Magnetization
metalloids
Earth (planet)
signatures
electronic structure
reflectance
magnetization
electrical resistivity

ASJC Scopus subject areas

  • Condensed Matter Physics

これを引用

Taniguchi, K., Katsufuji, T., Sakai, F., Ueda, H., Kitazawa, K., & Takagi, H. (2002). Charge dynamics and possibility of ferromagnetism in A1-xLaxB6 (A=Ca and Sr). Physical Review B - Condensed Matter and Materials Physics, 66(6), 644071-644077. [064407].

Charge dynamics and possibility of ferromagnetism in A1-xLaxB6 (A=Ca and Sr). / Taniguchi, K.; Katsufuji, Takuro; Sakai, F.; Ueda, H.; Kitazawa, K.; Takagi, H.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 66, 番号 6, 064407, 01.08.2002, p. 644071-644077.

研究成果: Article

Taniguchi, K, Katsufuji, T, Sakai, F, Ueda, H, Kitazawa, K & Takagi, H 2002, 'Charge dynamics and possibility of ferromagnetism in A1-xLaxB6 (A=Ca and Sr)', Physical Review B - Condensed Matter and Materials Physics, 巻. 66, 番号 6, 064407, pp. 644071-644077.
Taniguchi, K. ; Katsufuji, Takuro ; Sakai, F. ; Ueda, H. ; Kitazawa, K. ; Takagi, H. / Charge dynamics and possibility of ferromagnetism in A1-xLaxB6 (A=Ca and Sr). :: Physical Review B - Condensed Matter and Materials Physics. 2002 ; 巻 66, 番号 6. pp. 644071-644077.
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