High-field Magnetization and Magnetoresistance of CaCu3Ti4−xRuxO12

High-field Magnetization and Magnetoresistance of CaCu3Ti4−xRuxO12

We have investigated magnetization ( M ) and magnetoresistance (MR) of CaCu 3 Ti 4− x Ru x O 12 ( x =0, 1.5, and 4). The magnetization in magnetic fields ( H ) up to 52 T decreases with increasing Ru content x . The M – H curves for x =0 and 4 are almost linear in field, but that for x =1.5 is non-l...

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Veröffentlicht in:Journal of low temperature physics 2010-04, Vol.159 (1-2), p.143-146
Hauptverfasser: Kida, T., Kammuri, R., Yoshii, S., Hagiwara, M., Iwakawa, M., Kobayashi, W., Terasaki, I., Kindo, K.
Format: Artikel
Sprache:eng
Schlagworte:
CERAMICS
Characterization and Evaluation of Materials
Condensed Matter Physics
COPPER OXIDE
Low temperature physics
MAGNETIC FIELD
Magnetic fields
Magnetic Materials
Magnetism
Magnetization
Magnetoresistance
MAGNETORESISTIVITY
Nonlinearity
Physics
Physics and Astronomy
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Zusammenfassung:We have investigated magnetization ( M ) and magnetoresistance (MR) of CaCu 3 Ti 4− x Ru x O 12 ( x =0, 1.5, and 4). The magnetization in magnetic fields ( H ) up to 52 T decreases with increasing Ru content x . The M – H curves for x =0 and 4 are almost linear in field, but that for x =1.5 is non-linear and shows a convex-bending in high magnetic fields. Furthermore, a large negative MR about −70% at 52 T is observed for x =1.5. These experimental results suggest that the magnetic field increases the itinerancy for x =1.5.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-009-0108-4