Phenomenological modeling of the anisotropic molecular-based ringCr7 Cd

P. Kozłowski; G. Kamieniarz; M. Antkowiak; F. Tuna; G. A. Timco; R. E P Winpenny

doi:10.1016/j.poly.2009.02.022

Phenomenological modeling of the anisotropic molecular-based ringCr7 Cd

P. Kozłowski, G. Kamieniarz, M. Antkowiak, F. Tuna, G. A. Timco, R. E P Winpenny

Research output: Contribution to journal › Article › peer-review

Abstract

We fitted the data obtained from the susceptibility measurement performed on polycrystalline samples with two different sets of microscopic parameters. One set (a) contains only single ion anisotropy and the other (b) both single ion and exchange anisotropy. None of them can be favored on the basis of powder experiment. We demonstrated by means of quantum transfer matrix and exact diagonalization calculations that parameters with only one type and those comprising two types of anisotropy lead to qualitatively different behavior of magnetic susceptibility and torque calculated for a mono crystal. On the microscopic level me observe that the first anti-crossing gap between the ground and first exited states vanishes when two types of anisotropies (single ion and exchange) of different orientation (easy axis and easy plane) and similar magnitude are present in the system. © 2009 Elsevier Ltd.

Original language	English
Pages (from-to)	1852-1855
Number of pages	3
Journal	Polyhedron
Volume	28
Issue number	9-10
DOIs	https://doi.org/10.1016/j.poly.2009.02.022
Publication status	Published - 22 Jun 2009

Keywords

Anisotropy
Exact diagonalization
Molecular nanomagnet
Quantum transfer matrix

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10.1016/j.poly.2009.02.022

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title = "Phenomenological modeling of the anisotropic molecular-based ringCr7 Cd",

abstract = "We fitted the data obtained from the susceptibility measurement performed on polycrystalline samples with two different sets of microscopic parameters. One set (a) contains only single ion anisotropy and the other (b) both single ion and exchange anisotropy. None of them can be favored on the basis of powder experiment. We demonstrated by means of quantum transfer matrix and exact diagonalization calculations that parameters with only one type and those comprising two types of anisotropy lead to qualitatively different behavior of magnetic susceptibility and torque calculated for a mono crystal. On the microscopic level me observe that the first anti-crossing gap between the ground and first exited states vanishes when two types of anisotropies (single ion and exchange) of different orientation (easy axis and easy plane) and similar magnitude are present in the system. {\textcopyright} 2009 Elsevier Ltd.",

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T1 - Phenomenological modeling of the anisotropic molecular-based ringCr7 Cd

AU - Kozłowski, P.

AU - Kamieniarz, G.

AU - Antkowiak, M.

AU - Tuna, F.

AU - Timco, G. A.

AU - Winpenny, R. E P

PY - 2009/6/22

Y1 - 2009/6/22

N2 - We fitted the data obtained from the susceptibility measurement performed on polycrystalline samples with two different sets of microscopic parameters. One set (a) contains only single ion anisotropy and the other (b) both single ion and exchange anisotropy. None of them can be favored on the basis of powder experiment. We demonstrated by means of quantum transfer matrix and exact diagonalization calculations that parameters with only one type and those comprising two types of anisotropy lead to qualitatively different behavior of magnetic susceptibility and torque calculated for a mono crystal. On the microscopic level me observe that the first anti-crossing gap between the ground and first exited states vanishes when two types of anisotropies (single ion and exchange) of different orientation (easy axis and easy plane) and similar magnitude are present in the system. © 2009 Elsevier Ltd.

AB - We fitted the data obtained from the susceptibility measurement performed on polycrystalline samples with two different sets of microscopic parameters. One set (a) contains only single ion anisotropy and the other (b) both single ion and exchange anisotropy. None of them can be favored on the basis of powder experiment. We demonstrated by means of quantum transfer matrix and exact diagonalization calculations that parameters with only one type and those comprising two types of anisotropy lead to qualitatively different behavior of magnetic susceptibility and torque calculated for a mono crystal. On the microscopic level me observe that the first anti-crossing gap between the ground and first exited states vanishes when two types of anisotropies (single ion and exchange) of different orientation (easy axis and easy plane) and similar magnitude are present in the system. © 2009 Elsevier Ltd.

KW - Anisotropy

KW - Exact diagonalization

KW - Molecular nanomagnet

KW - Quantum transfer matrix

U2 - 10.1016/j.poly.2009.02.022

DO - 10.1016/j.poly.2009.02.022

M3 - Article

SN - 0277-5387

VL - 28

SP - 1852

EP - 1855

JO - Polyhedron

JF - Polyhedron

IS - 9-10

ER -

Phenomenological modeling of the anisotropic molecular-based ringCr7 Cd

Abstract

Keywords

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