Non-exponential behavior of the nuclear magnetization in H-doped copper oxides

E. M. Kunoff; S. D. Goren; C. Korn; Z. Gavra; J. R. Johnson; J. J. Reilly

doi:10.1016/0926-2040(94)90048-5

Non-exponential behavior of the nuclear magnetization in H-doped copper oxides

E. M. Kunoff, S. D. Goren, C. Korn, Z. Gavra, J. R. Johnson, J. J. Reilly

Department of Physics

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5 Scopus citations

Abstract

Measurement of the spin lattice relaxation time in H-doped Y₂BaCuO₅ and YBa₂Cu₃O₆ has revealed a power law growth of the nuclear magnetization M for short times following a saturation pulse sequence. Preliminary experimental results yield exponents of 1 2 and 1 3, depending on the amount of hydrogen present in the sample. We extend Blumberg's theory for relaxation due to paramagnetic centers via dipole-dipole interaction in the absence of spin diffusion to obtain M ∼ t^D/6 where D is the dimensionality of the system. This yields exponents of 1 2 and 1 3 for three- and two-dimensional systems, respectively. At long times the magnetization growth becomes exponential.

Original language	English
Pages (from-to)	23-27
Number of pages	5
Journal	Solid State Nuclear Magnetic Resonance
Volume	3
Issue number	1
DOIs	https://doi.org/10.1016/0926-2040(94)90048-5
State	Published - 1 Jan 1994

Keywords

H-doped copperoxides
dimensionality in spin lattice relaxation
paramagnetism

ASJC Scopus subject areas

Radiation
Chemistry (all)
Nuclear and High Energy Physics
Instrumentation

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10.1016/0926-2040(94)90048-5

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title = "Non-exponential behavior of the nuclear magnetization in H-doped copper oxides",

abstract = "Measurement of the spin lattice relaxation time in H-doped Y2BaCuO5 and YBa2Cu3O6 has revealed a power law growth of the nuclear magnetization M for short times following a saturation pulse sequence. Preliminary experimental results yield exponents of 1 2 and 1 3, depending on the amount of hydrogen present in the sample. We extend Blumberg's theory for relaxation due to paramagnetic centers via dipole-dipole interaction in the absence of spin diffusion to obtain M ∼ tD/6 where D is the dimensionality of the system. This yields exponents of 1 2 and 1 3 for three- and two-dimensional systems, respectively. At long times the magnetization growth becomes exponential.",

keywords = "H-doped copperoxides, dimensionality in spin lattice relaxation, paramagnetism",

author = "Kunoff, {E. M.} and Goren, {S. D.} and C. Korn and Z. Gavra and Johnson, {J. R.} and Reilly, {J. J.}",

note = "Funding Information: J.R.J. and J.J.R. wish to acknowledgeth e support of the U.S. Departmento f Energy, Division of Chemical Sciences, Office of Basic Energy Sciences under Contract DE-AC02-76CH00016. E.M.K. would like to thank R. Bailis for assistance in preparingt he graphicsa nd with someo f the experiments.",

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doi = "10.1016/0926-2040(94)90048-5",

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T1 - Non-exponential behavior of the nuclear magnetization in H-doped copper oxides

AU - Kunoff, E. M.

AU - Goren, S. D.

AU - Korn, C.

AU - Gavra, Z.

AU - Johnson, J. R.

AU - Reilly, J. J.

N1 - Funding Information: J.R.J. and J.J.R. wish to acknowledgeth e support of the U.S. Departmento f Energy, Division of Chemical Sciences, Office of Basic Energy Sciences under Contract DE-AC02-76CH00016. E.M.K. would like to thank R. Bailis for assistance in preparingt he graphicsa nd with someo f the experiments.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - Measurement of the spin lattice relaxation time in H-doped Y2BaCuO5 and YBa2Cu3O6 has revealed a power law growth of the nuclear magnetization M for short times following a saturation pulse sequence. Preliminary experimental results yield exponents of 1 2 and 1 3, depending on the amount of hydrogen present in the sample. We extend Blumberg's theory for relaxation due to paramagnetic centers via dipole-dipole interaction in the absence of spin diffusion to obtain M ∼ tD/6 where D is the dimensionality of the system. This yields exponents of 1 2 and 1 3 for three- and two-dimensional systems, respectively. At long times the magnetization growth becomes exponential.

AB - Measurement of the spin lattice relaxation time in H-doped Y2BaCuO5 and YBa2Cu3O6 has revealed a power law growth of the nuclear magnetization M for short times following a saturation pulse sequence. Preliminary experimental results yield exponents of 1 2 and 1 3, depending on the amount of hydrogen present in the sample. We extend Blumberg's theory for relaxation due to paramagnetic centers via dipole-dipole interaction in the absence of spin diffusion to obtain M ∼ tD/6 where D is the dimensionality of the system. This yields exponents of 1 2 and 1 3 for three- and two-dimensional systems, respectively. At long times the magnetization growth becomes exponential.

KW - H-doped copperoxides

KW - dimensionality in spin lattice relaxation

KW - paramagnetism

UR - http://www.scopus.com/inward/record.url?scp=0028372660&partnerID=8YFLogxK

U2 - 10.1016/0926-2040(94)90048-5

DO - 10.1016/0926-2040(94)90048-5

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AN - SCOPUS:0028372660

SN - 0926-2040

VL - 3

SP - 23

EP - 27

JO - Solid State Nuclear Magnetic Resonance

JF - Solid State Nuclear Magnetic Resonance

IS - 1

ER -

Non-exponential behavior of the nuclear magnetization in H-doped copper oxides

Abstract

Keywords

ASJC Scopus subject areas

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