NMR study of the electron spin density near iron group atoms in Cu.

Author: Boyce, J. B.
Published: United States : [publisher not identified], 1973.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1973.
Physical Description: microfiche : negative ; 11 x 15 cm
Additional Creators: Aton, T. J.

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Summary

From nineteenth conference on magnetism and magnetic materials; Boston; Massachusetts, USA (13 Nov 1973). Observations are reported on the nuclear resonances of Cu atoms which are near neighbors to 6 of the 3d transition element impurities in dilute Cu alloys. These systems are of interest in the Kondo problem. The resonances appear as satellites split from the strong resonance of the distant Cu atoms. Their splittings yield the magritude and spatial shape of the conduction electron spin magnetization. One shell of neighbors to Ni, two to V, three to Co, four to Cr and Mn, and five to Fe were observed. The satellite in CuNi was studied at liquid helium temperatures in fields from 6 to 60 kG and those in CuCo from 1.5 to 450 deg K and 6 to 63 kG. Results of studies on CuV from 8 to 63 kG at liquid helium temperatures, CuCr and CuMn from 7 to 15 kG at 300 deg K, and CuFe from; to 61 kG and 77 to 330 deg K are also reported. The satellite positions are independent of concentration from about 500 to 5000 ppM. The usual theoretical expressions for spin density are evaluated far from the impurity, where they depend only on the electrons at the Fermi surface. ln contrast, to treat the near neighbors a d-wave phase-shift analysis was developed in which conduction electrons of all energies are included lo fit the experimental splittings in both the magnetic and nonmagnetic cases. (auth)

Report Numbers

COO-1198-1020; CONF-731104-4

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

DOE contract number: AT(11-1)-1198
NSA number: NSA-29-007425
OSTI Identifier 4389813
Research organization: Univ. of Illinois at Urbana-Champaign, IL (United States).

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