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Title: Nuclear magnetic and quadrupole resonance in metallic powders in the presence of strong quadrupole interaction: Rhenium metal

Abstract

The nuclear-magnetic-resonance and nuclear-quadrupole-resonance (NQR-NMR) spectra of /sup 187/Re and /sup 185/Re in a powder of rhenium metal were measured in the temperature range 5--10 K both in zero field and with an external magnetic field. The zero-field NQR spectrum is severely broadened by a nonuniform distribution of quadrupole interactions. The average quadrupole coupling frequencies measured at 5 K are, for the two isotopes, ..nu../sub Q/ = 39 +- 0.2 MHz (/sup 187/Re) and ..nu../sub Q/ = 40.8 +- 0.3 MHz (/sup 185/Re). The spectra obtained in the presence of an external magnetic field can be interpreted satisfactorily in terms of transitions among the eigenstates of the full Hamiltonian (Zeeman plus quadrupolar). Measurements of relaxation rates yield T/sub 1/T = 0.03 sK, indicating a relaxation mechanism driven by the hyperfine interaction with the conduction electrons. The feasibility of NQR-NMR studies in small metal particles in the presence of strong inhomogeneous quadrupole interactions is assessed

Authors:
; ;
Publication Date:
Research Org.:
Institut de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, PHB-Ecublens, 1015 Lausanne, Switzerland
OSTI Identifier:
5356722
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. B: Condens. Matter; (United States); Journal Volume: 37:7
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; RHENIUM; NUCLEAR MAGNETIC RESONANCE; NUCLEAR QUADRUPOLE RESONANCE; INTERACTIONS; KNIGHT SHIFT; POWDERS; QUADRUPOLE MOMENTS; SPECTROSCOPY; ULTRALOW TEMPERATURE; ELEMENTS; MAGNETIC RESONANCE; METALS; RESONANCE; TRANSITION ELEMENTS; 360104* - Metals & Alloys- Physical Properties

Citation Formats

Dimitropoulos, C., Maglione, M., and Borsa, F. Nuclear magnetic and quadrupole resonance in metallic powders in the presence of strong quadrupole interaction: Rhenium metal. United States: N. p., 1988. Web. doi:10.1103/PhysRevB.37.3159.
Dimitropoulos, C., Maglione, M., & Borsa, F. Nuclear magnetic and quadrupole resonance in metallic powders in the presence of strong quadrupole interaction: Rhenium metal. United States. doi:10.1103/PhysRevB.37.3159.
Dimitropoulos, C., Maglione, M., and Borsa, F. Tue . "Nuclear magnetic and quadrupole resonance in metallic powders in the presence of strong quadrupole interaction: Rhenium metal". United States. doi:10.1103/PhysRevB.37.3159.
@article{osti_5356722,
title = {Nuclear magnetic and quadrupole resonance in metallic powders in the presence of strong quadrupole interaction: Rhenium metal},
author = {Dimitropoulos, C. and Maglione, M. and Borsa, F.},
abstractNote = {The nuclear-magnetic-resonance and nuclear-quadrupole-resonance (NQR-NMR) spectra of /sup 187/Re and /sup 185/Re in a powder of rhenium metal were measured in the temperature range 5--10 K both in zero field and with an external magnetic field. The zero-field NQR spectrum is severely broadened by a nonuniform distribution of quadrupole interactions. The average quadrupole coupling frequencies measured at 5 K are, for the two isotopes, ..nu../sub Q/ = 39 +- 0.2 MHz (/sup 187/Re) and ..nu../sub Q/ = 40.8 +- 0.3 MHz (/sup 185/Re). The spectra obtained in the presence of an external magnetic field can be interpreted satisfactorily in terms of transitions among the eigenstates of the full Hamiltonian (Zeeman plus quadrupolar). Measurements of relaxation rates yield T/sub 1/T = 0.03 sK, indicating a relaxation mechanism driven by the hyperfine interaction with the conduction electrons. The feasibility of NQR-NMR studies in small metal particles in the presence of strong inhomogeneous quadrupole interactions is assessed},
doi = {10.1103/PhysRevB.37.3159},
journal = {Phys. Rev. B: Condens. Matter; (United States)},
number = ,
volume = 37:7,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 1988},
month = {Tue Mar 01 00:00:00 EST 1988}
}