The magnetization and torque of niobium samples of different shapes rotating in a magnetic field are studied with emphasis on the behavior near the upper critical field H c2. The observed rotational magnetization is free of hysteresis and is found to represent a good approximation to the thermodynamic equilibrium magnetization of the samples if pinning is not too strong and the frequency of rotation is sufficiently low. The viscous contribution to the torque exhibits a step at H c2whose dependence on sample geometry is in good agreement with predictions derived under the simple assumption of a homogeneous arrangement of parallel straight vortices in the rotating sample.
Similar content being viewed by others
References
B. Heise, Rev. Mod. Phys. 36, 64 (1964).
S. L. Wipf, Westinghouse Sci. Paper 64-1 JO-280 Pl.
E. L. Andronikashvili, S. M. Ashimov, J. G. Chigvinadze, and J. S. Tsakadse, Phys. Lett. 25A, 85 (1967).
G. Eggendorfer, J. Low Temp. Phys. 10, 715 (1973).
M. Fuhrmans and C. Heiden, Cryogenics 16, 451 (1976).
K. Yamafuji and F. Irie, Phys. Lett. 25A, 387 (1967).
Y. B. Kim, C. R. Hempstead, and A. R. Strnad, Phys. Rev. 139, A1163 (1965).
A. Schmid, Phys. Condens. Mat. 5, 302 (1966).
C. Caroli and K. Maki, Phys. Rev. 164, 591 (1967).
R. Schäfer and C. Heiden, Appl. Phys. 9, 121 (1976).
J. A. Cape and J. M. Zimmerman, Phys. Rev. 153, 416 (1967).
R. Schäfer and C. Heiden, J. Low Temp. Phys. 30, 357 (1978).
R. Gans, Z. Math. Phys. 48, 1 (1902).
J. A. Osborne, Phys. Rev. 67, 351 (1945).
D. K. Finnemore, T. F. Stromberg, and C. A. Swenson, Phys. Rev. 149, 231 (1966).
T. Ezaki and F. Irie, J. Phys. Soc. Japan 40, 382 (1976).
T. Ezaki, K. Yamafuji, and F. Irie, J. Phys. Soc. Japan 40, 1271 (1976).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Heiden, C., Fuhrmans, M. & Schäfer, R. Magnetization and torque measurements on rotating niobium cylinders and ellipsoids. J Low Temp Phys 30, 337–355 (1978). https://doi.org/10.1007/BF00114957
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00114957