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Acta Physica Polonica A

Zero Temperature Magnetic Frustration in Nona-Membered s=3/2 Spin Rings with Bond Defect

Michał Antkowiak, Piotr Kozłowski, G. Kamieniarz

Published May 1, 2012• 2 citations
Publisher

Abstract

Zero-temperature limits of the local and global thermodynamic quantities in the nine-membered antiferromagnetic s = 3/2 spin ring are investigated by means of numerical exact diagonalization.An anisotropic Heisenberg model with tunable bond defect reecting continuously varying topology (from closed to open ring) is exploited.The frustrated and non-frustrated phases are identied in the ground-state phase diagram determined by a bond-defect strength and magnetic eld.Near the phase boundaries signicance of the thermal uctuations aecting the estimates of the local magnetic quantities found earlier at T = 1 K is revealed.For the global quantities the eects of thermal uctuations are found much weaker.A sequence of the local magnetic moments is analysed and their experimental verication at the edges of the non-frustrated and within the entire frustrated phase is suggested at suciently low temperature.

DOI
10.12693/aphyspola.121.1102

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Zero-temperature limits of the local and global thermodynamic quantities in the nine-membered antiferromagnetic s = 3/2 spin ring are investigated by means of numerical exact diagonalization.An anisotropic Heisenberg model with tunable bond defect reecting continuously varying topology (from closed to open ring) is exploited.The frustrated and non-frustrated phases are identied in the ground-state phase diagram determined by a bond-defect strength and magnetic eld.Near the phase boundaries signicance of the thermal uctuations aecting the estimates of the local magnetic quantities found earlier at T = 1 K is revealed.For the global quantities the eects of thermal uctuations are found much weaker.A sequence of the local magnetic moments is analysed and their experimental verication at the edges of the non-frustrated and within the entire frustrated phase is suggested at suciently low temperature.
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