Nuclear magnetic relaxation in the quasi-two-dimensional (C 2H5NH3)2Cd1-xMn xCl4 mixed crystal systems

J. T. Kim, J. K. Park, C. H. Lee, K. W. Lee, E. H. Choi, Cheol Eui Lee

Research output: Contribution to journalArticle

Abstract

We have studied the quasi-two-dimensional layered compound systems (C 2H5NH3)2Cd1-xMn xCl4 (0≤x≤1) by means of 1H nuclear magnetic resonance (NMR) measurements. In contrast to the case of the unmixed crystal compounds (x=0, 1) following a single-exponential type of the NMR spin-lattice relaxation, a stretched-exponential type of recovery, M(t)= M0[1-exp(-t/T1S)n], was necessary for the stoichiometric composition systems in addition to it, the exponent n depending on the randomly distributed paramagnetic Mn impurity concentration x. The spin-lattice relaxation rate T1S-1 thus obtained showed a maximum at a percolation threshold xc≈0.3, in agreement with a percolation theory of the paramagnetic impurity relaxation. The stacking dimensions of the paramagnetic ions were derived from the exponent n as a function of x.

Original languageEnglish
Pages (from-to)47-49
Number of pages3
JournalSolid State Communications
Volume182
DOIs
Publication statusPublished - 2014 Mar 1

Fingerprint

Magnetic relaxation
Spin-lattice relaxation
magnetic relaxation
mixed crystals
spin-lattice relaxation
Nuclear magnetic resonance
exponents
Impurities
Magnetic resonance measurement
impurities
nuclear magnetic resonance
Crystals
recovery
Ions
Recovery
thresholds
Chemical analysis
crystals
ions

Keywords

  • A. Perovskite-type layered compounds
  • D. Percolation theory of paramagnetic impurity relaxation
  • E. Nuclear magnetic resonance

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Chemistry

Cite this

Nuclear magnetic relaxation in the quasi-two-dimensional (C 2H5NH3)2Cd1-xMn xCl4 mixed crystal systems. / Kim, J. T.; Park, J. K.; Lee, C. H.; Lee, K. W.; Choi, E. H.; Lee, Cheol Eui.

In: Solid State Communications, Vol. 182, 01.03.2014, p. 47-49.

Research output: Contribution to journalArticle

Kim, J. T. ; Park, J. K. ; Lee, C. H. ; Lee, K. W. ; Choi, E. H. ; Lee, Cheol Eui. / Nuclear magnetic relaxation in the quasi-two-dimensional (C 2H5NH3)2Cd1-xMn xCl4 mixed crystal systems. In: Solid State Communications. 2014 ; Vol. 182. pp. 47-49.
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AU - Lee, C. H.

AU - Lee, K. W.

AU - Choi, E. H.

AU - Lee, Cheol Eui

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N2 - We have studied the quasi-two-dimensional layered compound systems (C 2H5NH3)2Cd1-xMn xCl4 (0≤x≤1) by means of 1H nuclear magnetic resonance (NMR) measurements. In contrast to the case of the unmixed crystal compounds (x=0, 1) following a single-exponential type of the NMR spin-lattice relaxation, a stretched-exponential type of recovery, M(t)= M0[1-exp(-t/T1S)n], was necessary for the stoichiometric composition systems in addition to it, the exponent n depending on the randomly distributed paramagnetic Mn impurity concentration x. The spin-lattice relaxation rate T1S-1 thus obtained showed a maximum at a percolation threshold xc≈0.3, in agreement with a percolation theory of the paramagnetic impurity relaxation. The stacking dimensions of the paramagnetic ions were derived from the exponent n as a function of x.

AB - We have studied the quasi-two-dimensional layered compound systems (C 2H5NH3)2Cd1-xMn xCl4 (0≤x≤1) by means of 1H nuclear magnetic resonance (NMR) measurements. In contrast to the case of the unmixed crystal compounds (x=0, 1) following a single-exponential type of the NMR spin-lattice relaxation, a stretched-exponential type of recovery, M(t)= M0[1-exp(-t/T1S)n], was necessary for the stoichiometric composition systems in addition to it, the exponent n depending on the randomly distributed paramagnetic Mn impurity concentration x. The spin-lattice relaxation rate T1S-1 thus obtained showed a maximum at a percolation threshold xc≈0.3, in agreement with a percolation theory of the paramagnetic impurity relaxation. The stacking dimensions of the paramagnetic ions were derived from the exponent n as a function of x.

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