Nuclear magnetic resonance investigations of Co nanoclusters in a SiO2 thin film matrix

T. Thomson; P. C. Riedi; S. Sankar; A. E. Berkowitz

doi:10.1063/1.364658

Nuclear magnetic resonance investigations of Co nanoclusters in a SiO2 thin film matrix

T. Thomson, P. C. Riedi, S. Sankar, A. E. Berkowitz

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Abstract

59Co nuclear magnetic resonance (NMR) spectra of small Co particles in a SiO2. matrix have been measured. In zero field, strong signals were obtained in the frequency range of 210-250 MHz. The 59Co NMR frequency in fcc multi (single) domain particles is 217.4 (223) MHz. Possible contributions to the Co hyperfine field and changes to the Co magnetic moment in nanoclusters are discussed. An enhanced magnetic moment could be responsible for an increase in the hyperfine field leading to the observed NMR line at ∼243 MHz. Measurements of the transverse relaxation time (T2) as a function of temperature and field are reported. © 1997 American Institute of Physics.

Original language	English
Pages (from-to)	5549-5551
Number of pages	2
Journal	Journal of Applied Physics
Volume	81
Issue number	8
DOIs	https://doi.org/10.1063/1.364658
Publication status	Published - 15 Apr 1997

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title = "Nuclear magnetic resonance investigations of Co nanoclusters in a SiO2 thin film matrix",

abstract = "59Co nuclear magnetic resonance (NMR) spectra of small Co particles in a SiO2. matrix have been measured. In zero field, strong signals were obtained in the frequency range of 210-250 MHz. The 59Co NMR frequency in fcc multi (single) domain particles is 217.4 (223) MHz. Possible contributions to the Co hyperfine field and changes to the Co magnetic moment in nanoclusters are discussed. An enhanced magnetic moment could be responsible for an increase in the hyperfine field leading to the observed NMR line at ∼243 MHz. Measurements of the transverse relaxation time (T2) as a function of temperature and field are reported. {\textcopyright} 1997 American Institute of Physics.",

author = "T. Thomson and Riedi, {P. C.} and S. Sankar and Berkowitz, {A. E.}",

note = "Thomson, T Riedi, PC Sankar, S Berkowitz, AE 41st Annual Conference on Magnetism and Magnetic Materials Nov 12-15, 1996 Atlanta, ga Amer Inst Phys Part 2b",

year = "1997",

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doi = "10.1063/1.364658",

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T1 - Nuclear magnetic resonance investigations of Co nanoclusters in a SiO2 thin film matrix

AU - Thomson, T.

AU - Riedi, P. C.

AU - Sankar, S.

AU - Berkowitz, A. E.

N1 - Thomson, T Riedi, PC Sankar, S Berkowitz, AE 41st Annual Conference on Magnetism and Magnetic Materials Nov 12-15, 1996 Atlanta, ga Amer Inst Phys Part 2b

PY - 1997/4/15

Y1 - 1997/4/15

N2 - 59Co nuclear magnetic resonance (NMR) spectra of small Co particles in a SiO2. matrix have been measured. In zero field, strong signals were obtained in the frequency range of 210-250 MHz. The 59Co NMR frequency in fcc multi (single) domain particles is 217.4 (223) MHz. Possible contributions to the Co hyperfine field and changes to the Co magnetic moment in nanoclusters are discussed. An enhanced magnetic moment could be responsible for an increase in the hyperfine field leading to the observed NMR line at ∼243 MHz. Measurements of the transverse relaxation time (T2) as a function of temperature and field are reported. © 1997 American Institute of Physics.

AB - 59Co nuclear magnetic resonance (NMR) spectra of small Co particles in a SiO2. matrix have been measured. In zero field, strong signals were obtained in the frequency range of 210-250 MHz. The 59Co NMR frequency in fcc multi (single) domain particles is 217.4 (223) MHz. Possible contributions to the Co hyperfine field and changes to the Co magnetic moment in nanoclusters are discussed. An enhanced magnetic moment could be responsible for an increase in the hyperfine field leading to the observed NMR line at ∼243 MHz. Measurements of the transverse relaxation time (T2) as a function of temperature and field are reported. © 1997 American Institute of Physics.

U2 - 10.1063/1.364658

DO - 10.1063/1.364658

M3 - Article

SN - 1089-7550

VL - 81

SP - 5549

EP - 5551

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

ER -

Nuclear magnetic resonance investigations of Co nanoclusters in a SiO2 thin film matrix

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