Abstract
Temperature dependence of the sound velocity of La1.85Sr0.15CuO4 single crystals has been measured in high magnetic fields up to 23 T. The anisotropy of the activation energy of the flux pinning is evaluated from the analysis of the excess elastic modulus due to the flux line lattice. The large activation energy of U(0 K, 14 T)=972 K and the small field dependence ∝ H-0.3 are obtained for H//c-plane where the intrinsic pinning mechanism due to the layered structure is effective. The value of U rapidly decreases with increasing the tilt angle θ between H and the c-plane. The angular dependence of U is explained on the basis of the three-dimensional stepwise-flux-line structure. Moreover, elastic anomalies have been observed at Tc and near irreversibility line. The upper critical field is evaluated from the anomaly at Tc and origin of the elastic anomaly near irreversibility line is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 327-331 |
| Number of pages | 5 |
| Journal | Science Reports of the Rerearch Institutes Tohoku University Series A-Physics |
| Volume | 42 |
| Issue number | 2 |
| Publication status | Published - 1996 May |
| Externally published | Yes |
Fingerprint
Keywords
- Flux line lattice elasticity
- Flux pinning
- High-T oxide
- LaSrCuO
- Ultrasonic measurement
ASJC Scopus subject areas
- Condensed Matter Physics
- Metals and Alloys
Cite this
Anisotropy of the flux pinning and elastic anomalies under high magnetic fields in La2-xSrxCuO4 . / Fukase, T.; Hanaguri, T.; Kamata, M.; Ishizuka, K.; Suzuki, T.; Goto, T.; Sasaki, T.
In: Science Reports of the Rerearch Institutes Tohoku University Series A-Physics, Vol. 42, No. 2, 05.1996, p. 327-331.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Anisotropy of the flux pinning and elastic anomalies under high magnetic fields in La2-xSrxCuO4
AU - Fukase, T.
AU - Hanaguri, T.
AU - Kamata, M.
AU - Ishizuka, K.
AU - Suzuki, T.
AU - Goto, T.
AU - Sasaki, T.
PY - 1996/5
Y1 - 1996/5
N2 - Temperature dependence of the sound velocity of La1.85Sr0.15CuO4 single crystals has been measured in high magnetic fields up to 23 T. The anisotropy of the activation energy of the flux pinning is evaluated from the analysis of the excess elastic modulus due to the flux line lattice. The large activation energy of U(0 K, 14 T)=972 K and the small field dependence ∝ H-0.3 are obtained for H//c-plane where the intrinsic pinning mechanism due to the layered structure is effective. The value of U rapidly decreases with increasing the tilt angle θ between H and the c-plane. The angular dependence of U is explained on the basis of the three-dimensional stepwise-flux-line structure. Moreover, elastic anomalies have been observed at Tc and near irreversibility line. The upper critical field is evaluated from the anomaly at Tc and origin of the elastic anomaly near irreversibility line is discussed.
AB - Temperature dependence of the sound velocity of La1.85Sr0.15CuO4 single crystals has been measured in high magnetic fields up to 23 T. The anisotropy of the activation energy of the flux pinning is evaluated from the analysis of the excess elastic modulus due to the flux line lattice. The large activation energy of U(0 K, 14 T)=972 K and the small field dependence ∝ H-0.3 are obtained for H//c-plane where the intrinsic pinning mechanism due to the layered structure is effective. The value of U rapidly decreases with increasing the tilt angle θ between H and the c-plane. The angular dependence of U is explained on the basis of the three-dimensional stepwise-flux-line structure. Moreover, elastic anomalies have been observed at Tc and near irreversibility line. The upper critical field is evaluated from the anomaly at Tc and origin of the elastic anomaly near irreversibility line is discussed.
KW - Flux line lattice elasticity
KW - Flux pinning
KW - High-T oxide
KW - LaSrCuO
KW - Ultrasonic measurement
UR - http://www.scopus.com/inward/record.url?scp=0040823599&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0040823599&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0040823599
VL - 42
SP - 327
EP - 331
JO - Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry and Metallurgy
JF - Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry and Metallurgy
SN - 0040-8808
IS - 2
ER -