EPR study of the two-dimensional molecular composite [NH3-(CH2)5-NH3]CuCl4: Evidence for both spin diffusion and spin anisotropies

The quasi two-dimensional single crystal [NH3-(CH2)5-NH3]CuCl4 has been studied by EPR measurements at X-band, room temperature andT = 100 K in three perpendicular planes (a, b), (a, c), (b, c*). This compound crystallizes in the monoclinic system with four entities per unit cell. Only one EPR excha...

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Veröffentlicht in:Applied magnetic resonance 1998-02, Vol.14 (1), p.25-35
Hauptverfasser: Filloleau, N., Zouari, R., Bissey, J. C., Chanh, N. B., Daoud, A.
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container_issue 1
container_start_page 25
container_title Applied magnetic resonance
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creator Filloleau, N.
Zouari, R.
Bissey, J. C.
Chanh, N. B.
Daoud, A.
description The quasi two-dimensional single crystal [NH3-(CH2)5-NH3]CuCl4 has been studied by EPR measurements at X-band, room temperature andT = 100 K in three perpendicular planes (a, b), (a, c), (b, c*). This compound crystallizes in the monoclinic system with four entities per unit cell. Only one EPR exchange-collapsed line was observed for the four magnetically inequivalent copper ions in the lattice at room temperature. A careful analysis of experimental data permits us to obtain the principal values of theg-factor:g┴=2.052 andg║=2.267. The EPR linewidth exhibits a minimum along the г п ≈/4 direction of (a, c*) plane attributable to spin diffusion. Along the г п ≈/4 direction of (b, c*) plane the linewidth exhibits a maximum attributable to the two magnetically inequivalent sub-systems located in two adjacent mineral sheets. The simulations of EPR spectra obtained along the bisector of (b, c*) angle at room temperature and atT = 100 K show that exchange interaction between these two dissimilar sub-systems is nearly equal to zero.
doi_str_mv 10.1007/BF03162004
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subjects Ammonia
Molecular composites
Room temperature
Single crystals
Superhigh frequencies
Unit cell
title EPR study of the two-dimensional molecular composite [NH3-(CH2)5-NH3]CuCl4: Evidence for both spin diffusion and spin anisotropies
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