78. Nuclear magnetic resonance in diluted Cu-Mn alloys

✍ Scribed by W. Van der Lugt; N.J. Poulis

• Publisher: Elsevier Science
• Year: 1958
• Weight: 73 KB
• Volume: 24
• Category: Article
• ISSN: 0031-8914
• DOI: 10.1016/s0031-8914(58)80593-5

✦ Synopsis

The shape of the saCu nuclear magnetic resonance line in Cu-metal proves to depend strongly on very small amounts of paramagnetic impurities (e.g. Mn). The line width zJ, defined as the distance in field strength between the two points of maximum slope of the absorption curve, which is about 6.60e in pure copper, is broadened by an appreciable factor, which depends on temperature, Mn-concentration and the d.c. field strength H0. A proved to increase with increasing concentration and d.c. field strength and with decreasing temperature, amounting to A= 85 Oe for 0.06% Mn and H0= 8500 Oe at 1.25 °K. Three samples were investigated: 0.01 ~o Mn, 0.03% Mn and 0.06~/o Mn, in the temperature range from l to 90°K, and in fields from 1770 Oe to 8500 Oe. The measurements were performed with a Pound-Watkins oscillator and a lock-in amplifier.