Abstract
The specific heat C of YBa2Cu3O7-δ (δ=0, 0.69, 0.91), Y1.1Ba1.9Cu3O7-δ and BaCuO2+x has been investigated in magnetic fields up to 6 T. In addition to the γ*T term and the upturn, characteristic behaviors of C/T consisting of the increase of γ* with magnetic fields, an appearance of a broad hump and a rapid decrease of C/T toward zero at the lowest temperatures are observed in all the YBa2Cu3O7-δ samples investigated. BaCuO2+x, one of the possible impurity phases included in the Y-Ba-Cu-O system, also shows a similar behavior of C/T as YBa2Cu3O7-δ. Particularly, BaCuO2+x explains the anomalous phenomenon observed in YBa2Cu3O6.31 at 6 T that the C/T at 1.5 K attains to the γ* value at 0 T. The γ* value is attributed to the BaCuO2+x included in the matrix.
| Original language | English |
|---|---|
| Pages (from-to) | 395-404 |
| Number of pages | 10 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 156 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1988 Oct 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
Cite this
Specific heat of YBa2Cu3O7-δ and BaCuO2+x in magnetic fields up to 6 T. / Sasaki, T.; Nakatsu, O.; Kobayashi, N.; Yamamoto, Ayako; Kikuchi, M.; Liu, A.; Hiraga, K.; Syono, Y.; Muto, Y.
In: Physica C: Superconductivity and its Applications, Vol. 156, No. 3, 01.10.1988, p. 395-404.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Specific heat of YBa2Cu3O7-δ and BaCuO2+x in magnetic fields up to 6 T
AU - Sasaki, T.
AU - Nakatsu, O.
AU - Kobayashi, N.
AU - Yamamoto, Ayako
AU - Kikuchi, M.
AU - Liu, A.
AU - Hiraga, K.
AU - Syono, Y.
AU - Muto, Y.
PY - 1988/10/1
Y1 - 1988/10/1
N2 - The specific heat C of YBa2Cu3O7-δ (δ=0, 0.69, 0.91), Y1.1Ba1.9Cu3O7-δ and BaCuO2+x has been investigated in magnetic fields up to 6 T. In addition to the γ*T term and the upturn, characteristic behaviors of C/T consisting of the increase of γ* with magnetic fields, an appearance of a broad hump and a rapid decrease of C/T toward zero at the lowest temperatures are observed in all the YBa2Cu3O7-δ samples investigated. BaCuO2+x, one of the possible impurity phases included in the Y-Ba-Cu-O system, also shows a similar behavior of C/T as YBa2Cu3O7-δ. Particularly, BaCuO2+x explains the anomalous phenomenon observed in YBa2Cu3O6.31 at 6 T that the C/T at 1.5 K attains to the γ* value at 0 T. The γ* value is attributed to the BaCuO2+x included in the matrix.
AB - The specific heat C of YBa2Cu3O7-δ (δ=0, 0.69, 0.91), Y1.1Ba1.9Cu3O7-δ and BaCuO2+x has been investigated in magnetic fields up to 6 T. In addition to the γ*T term and the upturn, characteristic behaviors of C/T consisting of the increase of γ* with magnetic fields, an appearance of a broad hump and a rapid decrease of C/T toward zero at the lowest temperatures are observed in all the YBa2Cu3O7-δ samples investigated. BaCuO2+x, one of the possible impurity phases included in the Y-Ba-Cu-O system, also shows a similar behavior of C/T as YBa2Cu3O7-δ. Particularly, BaCuO2+x explains the anomalous phenomenon observed in YBa2Cu3O6.31 at 6 T that the C/T at 1.5 K attains to the γ* value at 0 T. The γ* value is attributed to the BaCuO2+x included in the matrix.
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UR - http://www.scopus.com/inward/citedby.url?scp=0024103712&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(88)90763-0
DO - 10.1016/0921-4534(88)90763-0
M3 - Article
AN - SCOPUS:0024103712
VL - 156
SP - 395
EP - 404
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3
ER -