Nuclear-spin-lattice relaxation in natural clays via paramagnetic centers

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.9952· OSTI ID:385706

Labouriau, A; Kim, Y; Earl, W L ^[1]

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1. Chemical Sciences and Technology Division, Mail Stop J514, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Nuclear-spin-lattice relaxation time measurements were made on {sup 29}Si nuclei in a series of 2:1 natural clay minerals. The magnetization recovery was found to be nonexponential. The nuclear relaxation arises from coupling to fixed paramagnetic impurities in the absence of spin diffusion. A theory is developed in which the nuclear spin relaxation behavior is expressed as an error function. These clays have very similar structures which allow the relative concentration of paramagnetic centers to be obtained from the fit of the magnetization recovery curves. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Los Alamos National Laboratory
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 385706
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CLAYS
MAGNETIC IMPURITIES
MAGNETIZATION
NUCLEAR MAGNETIC MOMENTS
PARAMAGNETISM
RELAXATION TIME
SILICON 29
SPIN-LATTICE RELAXATION