Abstract
Phonon spectra of ferromagnetic CaB6 and CaB2C 2 have been investigated by Raman scattering. In CaB6, a doublet spectrum has been observed for Eg phonon and is understood by an anisotropic charge distribution at B6. For ferromagnetism, the magnetic moment of CaB6 is attributed to the B6 octahedron, since the intensity of the phonon peaks of A1g and E1g changes in the vicinity of ferromagnetic Curie temperature. These results of CaB6 are explained by electron condensate model. In CaB2C2 two phonon modes have been observed, but the spectra at higher temperature were not measured due to sample damage by laser. For both ferromagnetic crystals, the ionic interaction between Ca and B/C is smaller than that between rare earth ion and B/C in the isomorphous crystals. This result might be important to clarify a ferromagnetic interaction.
| Original language | English |
|---|---|
| Pages (from-to) | 314-316 |
| Number of pages | 3 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 71 |
| Issue number | SUPPL. |
| Publication status | Published - 2002 |
| Externally published | Yes |
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Keywords
- CaBC
- CaB
- Exciton condensate model
- Magnetic moment from B
- Raman scattering
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Raman scattering investigation of high temperature ferromagnetic crystals. / Udagawa, Masayuki; Nagai, Shinji; Ogita, Norio; Iga, Fumitoshi; Kaji, Rina; Sumida, Kazuyuki; Akimitsu, Jun; Kunii, Satoru; Suzuki, Kazuya; Onodera, Hideya; Yamaguchi, Yasuo.
In: Journal of the Physical Society of Japan, Vol. 71, No. SUPPL., 2002, p. 314-316.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Raman scattering investigation of high temperature ferromagnetic crystals
AU - Udagawa, Masayuki
AU - Nagai, Shinji
AU - Ogita, Norio
AU - Iga, Fumitoshi
AU - Kaji, Rina
AU - Sumida, Kazuyuki
AU - Akimitsu, Jun
AU - Kunii, Satoru
AU - Suzuki, Kazuya
AU - Onodera, Hideya
AU - Yamaguchi, Yasuo
PY - 2002
Y1 - 2002
N2 - Phonon spectra of ferromagnetic CaB6 and CaB2C 2 have been investigated by Raman scattering. In CaB6, a doublet spectrum has been observed for Eg phonon and is understood by an anisotropic charge distribution at B6. For ferromagnetism, the magnetic moment of CaB6 is attributed to the B6 octahedron, since the intensity of the phonon peaks of A1g and E1g changes in the vicinity of ferromagnetic Curie temperature. These results of CaB6 are explained by electron condensate model. In CaB2C2 two phonon modes have been observed, but the spectra at higher temperature were not measured due to sample damage by laser. For both ferromagnetic crystals, the ionic interaction between Ca and B/C is smaller than that between rare earth ion and B/C in the isomorphous crystals. This result might be important to clarify a ferromagnetic interaction.
AB - Phonon spectra of ferromagnetic CaB6 and CaB2C 2 have been investigated by Raman scattering. In CaB6, a doublet spectrum has been observed for Eg phonon and is understood by an anisotropic charge distribution at B6. For ferromagnetism, the magnetic moment of CaB6 is attributed to the B6 octahedron, since the intensity of the phonon peaks of A1g and E1g changes in the vicinity of ferromagnetic Curie temperature. These results of CaB6 are explained by electron condensate model. In CaB2C2 two phonon modes have been observed, but the spectra at higher temperature were not measured due to sample damage by laser. For both ferromagnetic crystals, the ionic interaction between Ca and B/C is smaller than that between rare earth ion and B/C in the isomorphous crystals. This result might be important to clarify a ferromagnetic interaction.
KW - CaBC
KW - CaB
KW - Exciton condensate model
KW - Magnetic moment from B
KW - Raman scattering
UR - http://www.scopus.com/inward/record.url?scp=33344473710&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33344473710&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:33344473710
VL - 71
SP - 314
EP - 316
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - SUPPL.
ER -