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

Technical Report · Mon Jan 01 04:00:00 EST 1973

DOI:https://doi.org/10.2172/4389813· OSTI ID:4389813

Boyce, J. B.; Aton, T. J.

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)

• Research Organization: Illinois Univ., Urbana (USA)
• NSA Number: NSA-29-007425
• OSTI ID: 4389813
• Report Number(s): COO--1198-1020; CONF-731104--4
• Country of Publication: United States
• Language: English

Related Subjects

*COPPER BASE ALLOYS-- NUCLEAR MAGNETIC RESONANCE
BAND THEORY
BINARY ALLOY SYSTEMS
CHROMIUM
DILUTE ALLOYS
ELECTRON SPIN RESONANCE
ELECTRONS
IMPURITIES
INTERMETALLIC COMPOUNDS
IRON
KONDO EFFECT
MAGNETIC FIELDS
MANGANESE
MEDIUM TEMPERATURE
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
SPATIAL RESOLUTION
VANADIUM