Tilt angle effect of intrinsic flux pinning in a single crystal of La1.85Sr0.15CuO4

T. Fukase, M. Kamata, K. Ishizuka, Takao Suzuki, T. Goto, T. Sasaki

Research output: Contribution to journalArticle

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Abstract

The anisotropy of the activation energy of the flux pinning in a La1.85Sr0.15CuO4 single crystal was investigated by ultrasonic measurements in various directions of wave vector k, polarization vector u and magnetic fields H. The large activation energy of U(0 K, 14 T) = 972 K and small field dependence ∝H-0.3 were obtained for H ∥ c-plane, when the flux motion is parallel to the c-axis where the intrinsic pinning mechanism due to the layered structure is effective. The elastic modulus of the flux-line lattice which moves parallel to the c-axis is proportional to H2 cos 2θ, and the value of U rapidly decreases with increasing tilt angle θ between H and the c-plane (U(θ = 10°) ∼ 300 K, U(θ = 30°) ∼ 75 K). These angular dependences of the elastic modulus and the activation energy can be explained on the basis of the intrinsic pinning mechanism and the three-dimensional stepwise flux-line structure.

Original languageEnglish
Pages (from-to)420-423
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume263
Issue number1-4
Publication statusPublished - 1996 May
Externally publishedYes

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Flux pinning
flux pinning
Activation energy
Single crystals
Fluxes
activation energy
single crystals
modulus of elasticity
Elastic moduli
Ultrasonic measurement
Anisotropy
ultrasonics
Polarization
Magnetic fields
anisotropy
polarization
magnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Tilt angle effect of intrinsic flux pinning in a single crystal of La1.85Sr0.15CuO4. / Fukase, T.; Kamata, M.; Ishizuka, K.; Suzuki, Takao; Goto, T.; Sasaki, T.

In: Physica C: Superconductivity and its Applications, Vol. 263, No. 1-4, 05.1996, p. 420-423.

Research output: Contribution to journalArticle

Fukase, T, Kamata, M, Ishizuka, K, Suzuki, T, Goto, T & Sasaki, T 1996, 'Tilt angle effect of intrinsic flux pinning in a single crystal of La1.85Sr0.15CuO4', Physica C: Superconductivity and its Applications, vol. 263, no. 1-4, pp. 420-423.
Fukase, T. ; Kamata, M. ; Ishizuka, K. ; Suzuki, Takao ; Goto, T. ; Sasaki, T. / Tilt angle effect of intrinsic flux pinning in a single crystal of La1.85Sr0.15CuO4. In: Physica C: Superconductivity and its Applications. 1996 ; Vol. 263, No. 1-4. pp. 420-423.
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AU - Goto, T.

AU - Sasaki, T.

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