Measurements of the Nernst effect over a wide range of magnetic field and temperature in a nearly reversible alloy (Nb80Mo20, T c = 4.15 K, κ ∼- 4.1) are reported. Data are presented in the form of vortex transport entropy S d computed from the Nernst effect. At T = 3.5 K, values of S d (Nernst) agree well with values of S d (Ettingshausen) for fields between about 2H c1 and 0.5H c2 ,in spite of the fact that pinning forces for current-induced motion exceed those for thermally induced motion by a factor of ten at this temperature. Our measurements indicate that S d (B ≃- 0, T) > S i (B ≃- 0, T) for T ≲ 0.63T C ,where S i is the entropy of formation per vortex. Values of S d (0, T) are compared with low-field theory. The pinning forces are discussed in terms of surface pinning.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
P. R. Solomon and F. A. Otter, Jr., Phys. Rev. 164, 608 (1967).
F. A. Otter, Jr. and P. R. Solomon, in Proc. 11th Int. Conf. Low Temp. Phys. (St. Andrews, Scotland, 1968), pp. 841–845.
R. W. Shaw, D. E. Mapother, and D. C. Hopkins, Phys. Rev. 120, 88 (1960).
R. A. French, J. Lowell, and K. Mendelssohn, Cryogenics 7, 83 (1967).
Y. Muto, K. Mori, and K. Noto, in Proc. Int. Conf. on Superconductivity, Stanford University, August 1969, Physica 55, 362 (1971).
R. A. French and J. Lowell, Phys. Rev. 173, 504 (1968).
R. Ehrat and L. Rinderer, J. Low Temp. Phys. 7, 533 (1972).
F. Vidal, Phys. Rev. B 8, 1982 (1973).
F. A. Otter, Jr. and P. R. Solomon, in Proc. Int. Conf. on Superconductivity, Stanford University, August 1969, Physica 55, 351 (1971).
K. Maki, Phys. Rev. Lett. 21, 1755 (1968); H. Takayama and H. Ebisawa, Prog. Theor. Phys. 44, 1450 (1970); A. Houghton and K. Maki, Phys. Rev. B 3, 1625 (1971).
F. A. Otter, Jr. and P. R. Solomon, unpublished.
R. Ehrat and L. Rinderer, Phys. Lett. 30A, 95 (1969).
R. Ehrat and L. Rinderer, in Low Temperature Physics LT-13 (Prop. 13th Int. Conf. Low Temp. Phys., Boulder, Colorado, 1972) (Plenum, New York, 1974).
L. Kramer, W. Pesch, and R. J. Watts-Tobin, J. Low Temp. Phys. 14, 29 (1974).
O. L. de Lange and F. A. Otter, Jr., J. Phys. Chem. Solids 33, 1571 (1972).
J. R. Clem, Phys. Rev. 176, 531 (1968).
J. R. Clem, Phys. Rev. Lett. 20, 735 (1968).
J. Bardeen, G. Rickayzen, and L. Tewordt, Phys. Rev. 113, 982 (1959).
G. B. Yntema, in Proc. 11th Int. Conf. Low Temp. Phys. (St. Andrews, Scotland 1968) p. 846.
F. J. Morin and J. P. Maita, Phys. Rev. 129, 1115 (1963).
O. L. de Lange, to appear in J. Phys. F: Metal Phys. 4 (1974).
O. L. de Lange, to be published.
G. M. Eliashberg, Soviet Phys.—JETP 28, 1298 (1969).
M. Cyrot, Rep. Prog. Phys. 36, 103 (1973).
N. Ya Fogel, Soviet Phys.—JETP 36, 725 (1973).
O. L. de Lange, Thesis, Clarkson College of Technology (1971).
C. R. Hu and R. S. Thompson, Phys. Rev. Lett. 31, 217 (1973).
A. M. Campbell, J. E. Evetts, and D. Dew-Hughes, Phil. Mag. 18, 313 (1968).
H. T. Coffey, Phys. Rev. 166, 447 (1968).
J. Lowell, J. Phys. C 2, 372 (1969).
F. Gascon, J. Lowell, and J. Munoz, Phys. Lett. 24A, 257 (1967).
Author information
Authors and Affiliations
Additional information
Portions of this research form part of a dissertation submitted by O. L. de Lange to Clarkson College of Technology in partial fulfillment of the requirements for the Ph.D. degree.
Rights and permissions
About this article
Cite this article
de Lange, O.L., Otter, F.A. Flux flow effects in a nearly reversible type II superconductor. J Low Temp Phys 18, 31–42 (1975). https://doi.org/10.1007/BF00116967
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00116967