Further studies of nuclear ordering in metallic copper

• Published in: Journal of low temperature physics Vol. 50; no. 5-6; pp. 523 - 543
• Main Authors: HUIKU, M. T, SOINI, J. K
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01-03-1983
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Materials science; Metals, semimetals and alloys; Other topics in magnetic properties and materials; Physics; Saturation moments and magnetic susceptibilities; Specific materials; NMR; Spin lattice relaxation; Polycrystal; Very low temperature; Nuclear magnetic resonance; Wire; Magnetic susceptibility
• ISSN: 0022-2291; 1573-7357
• DOI: 10.1007/BF00683494

The nuclear spin system of polycrystalline Cu wires was studied down to 50 nK using two nuclear demagnetization refrigerators in cascade and showed no definite indication of a transition to an ordered state. However, the static susceptibility parallel to the wires was 30% smaller than the perpendicular susceptibility at zero field at the lowest temp. Careful measurements of the field dependence of the static susceptibility in the parallel direction showed no saturation at the lowest temp. in small fields, in contrast to previous observation in the perpendicular direction. The Cu sample, which had no preferred orientation of crystals, thus had an orientation-dependent static susceptibility at the lowest temp. 18 ref.--AA