Details
| Original language | English |
|---|---|
| Article number | 011 |
| Pages (from-to) | 3997-4003 |
| Number of pages | 7 |
| Journal | Journal of Physics: Condensed Matter |
| Volume | 3 |
| Issue number | 22 |
| Publication status | Published - 1991 |
Abstract
The magnetic susceptibility of phases with block type structures in the Nb2O5-2x system, with 0<or=x<or=0.083, has been determined by the Faraday method in the temperature region 77-400 K. The samples consisted of crystals of composition Nb28O70(Nb 2O5), Nb53O132(NbO2.491), Nb25O62(NbO2.480), Nb47O 116(NbO2.468), Nb22O54(NbO 2.454) and Nb12O29(NbO2.417). It is shown that the observed paramagnetic behaviour cannot be explained within the framework of classical Debye-Langevin behaviour or by Pauli paramagnetism. Instead, a Van Vleck type analysis of the magnetic susceptibility data gives evidence for the occurrence of bipolaron/single-polaron states at lower degrees of reduction (x<0.05), in agreement with previous interpretations of electrical and optical properties. The quasi-metallic state for x>or=0.05 reveals localized electrons, as suggested earlier.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics: Condensed Matter, Vol. 3, No. 22, 011, 1991, p. 3997-4003.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Magnetic properties of phases possessing block type structures in the Nb2O5-2x system, with O<or=x<or=0.083
AU - Ruscher, C. H.
AU - Nygren, M.
PY - 1991
Y1 - 1991
N2 - The magnetic susceptibility of phases with block type structures in the Nb2O5-2x system, with 028O70(Nb 2O5), Nb53O132(NbO2.491), Nb25O62(NbO2.480), Nb47O 116(NbO2.468), Nb22O54(NbO 2.454) and Nb12O29(NbO2.417). It is shown that the observed paramagnetic behaviour cannot be explained within the framework of classical Debye-Langevin behaviour or by Pauli paramagnetism. Instead, a Van Vleck type analysis of the magnetic susceptibility data gives evidence for the occurrence of bipolaron/single-polaron states at lower degrees of reduction (x<0.05), in agreement with previous interpretations of electrical and optical properties. The quasi-metallic state for x>or=0.05 reveals localized electrons, as suggested earlier.
AB - The magnetic susceptibility of phases with block type structures in the Nb2O5-2x system, with 028O70(Nb 2O5), Nb53O132(NbO2.491), Nb25O62(NbO2.480), Nb47O 116(NbO2.468), Nb22O54(NbO 2.454) and Nb12O29(NbO2.417). It is shown that the observed paramagnetic behaviour cannot be explained within the framework of classical Debye-Langevin behaviour or by Pauli paramagnetism. Instead, a Van Vleck type analysis of the magnetic susceptibility data gives evidence for the occurrence of bipolaron/single-polaron states at lower degrees of reduction (x<0.05), in agreement with previous interpretations of electrical and optical properties. The quasi-metallic state for x>or=0.05 reveals localized electrons, as suggested earlier.
UR - http://www.scopus.com/inward/record.url?scp=0000679824&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/3/22/011
DO - 10.1088/0953-8984/3/22/011
M3 - Article
AN - SCOPUS:0000679824
VL - 3
SP - 3997
EP - 4003
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 22
M1 - 011
ER -