2001/03/31 by A. Handstein, D. Hinz, G. Fuchs +5
Physics and Astronomy · #cond-mat.supr-con #cond-mat.mtrl-sci
published as J. Alloys & Comp. 329 (2001) 285. · 17 pages with 6 figures. Text modified, 2 figures added
arxiv created 2001/06/05 · arxiv updated 2009/11/30
Bulk textured MgB2 material of nearly full density showing a weak c-axis alignment of the hexagonal MgB2 grains parallel to the pressure direction was obtained by hot deformation of a stoichiometric MgB2 pellet prepared by a gas-solid reaction. The texture of the material was verified by comparing the x-ray diffraction patterns of the hot deformed material with isotropic MgB2 powder. A small, but distinct anisotropy of the upper critical field up to Hc2a,b/Hc2c~1.2 depending on degree of texture was found by resistance and susceptibility measurements. No anisotropy of the critical current density determined from magnetization measurements was found for the textured material.