Gadolinium as an accelerator for reaching thermal equilibrium and its influence on the ground state of Dy2GdN@ C80 single-molecule magnets
(2021) In Physical Review B 103(1).- Abstract
Endohedral fullerenes are perfect nanolaboratories for the study of magnetism. The substitution of a diamagnetic scandium atom in Dy2ScN@C80 with gadolinium decreases the stability of a given magnetization and demonstrates Gd to act as a single atom catalyst that accelerates the reaching of thermal equilibrium. X-ray magnetic circular dichroism at the M4,5 edges of Gd and Dy shows that Gd affects the ground state. The Gd magnetic moment follows the sum of the external and the dipolar magnetic field of the two Dy ions and compared to Dy2ScN@C80 a lower exchange barrier is found between the ferromagnetic and the antiferromagnetic Dy configuration. The Arrhenius equilibration barrier as obtained from superconducting quantum interference... (More)
Endohedral fullerenes are perfect nanolaboratories for the study of magnetism. The substitution of a diamagnetic scandium atom in Dy2ScN@C80 with gadolinium decreases the stability of a given magnetization and demonstrates Gd to act as a single atom catalyst that accelerates the reaching of thermal equilibrium. X-ray magnetic circular dichroism at the M4,5 edges of Gd and Dy shows that Gd affects the ground state. The Gd magnetic moment follows the sum of the external and the dipolar magnetic field of the two Dy ions and compared to Dy2ScN@C80 a lower exchange barrier is found between the ferromagnetic and the antiferromagnetic Dy configuration. The Arrhenius equilibration barrier as obtained from superconducting quantum interference device magnetometry is more than one order of magnitude larger, though a much smaller prefactor imposes the faster equilibration in Dy2GdN@C80. This sheds light on the importance of angular momentum balance and symmetry in magnetic relaxation.
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- author
- Kostanyan, Aram ; Schlesier, Christin ; Westerström, Rasmus LU ; Dreiser, Jan ; Fritz, Fabian ; Büchner, Bernd ; Popov, Alexey A. ; Piamonteze, Cinthia and Greber, Thomas
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 103
- issue
- 1
- article number
- 014404
- publisher
- American Physical Society
- external identifiers
-
- scopus:85099209694
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.103.014404
- language
- English
- LU publication?
- yes
- id
- 90a4f01b-4b2e-4369-b358-226d7e21109f
- date added to LUP
- 2021-01-25 09:37:30
- date last changed
- 2023-11-20 21:57:12
@article{90a4f01b-4b2e-4369-b358-226d7e21109f,
abstract = {{<p>Endohedral fullerenes are perfect nanolaboratories for the study of magnetism. The substitution of a diamagnetic scandium atom in Dy2ScN@C80 with gadolinium decreases the stability of a given magnetization and demonstrates Gd to act as a single atom catalyst that accelerates the reaching of thermal equilibrium. X-ray magnetic circular dichroism at the M4,5 edges of Gd and Dy shows that Gd affects the ground state. The Gd magnetic moment follows the sum of the external and the dipolar magnetic field of the two Dy ions and compared to Dy2ScN@C80 a lower exchange barrier is found between the ferromagnetic and the antiferromagnetic Dy configuration. The Arrhenius equilibration barrier as obtained from superconducting quantum interference device magnetometry is more than one order of magnitude larger, though a much smaller prefactor imposes the faster equilibration in Dy2GdN@C80. This sheds light on the importance of angular momentum balance and symmetry in magnetic relaxation.</p>}},
author = {{Kostanyan, Aram and Schlesier, Christin and Westerström, Rasmus and Dreiser, Jan and Fritz, Fabian and Büchner, Bernd and Popov, Alexey A. and Piamonteze, Cinthia and Greber, Thomas}},
issn = {{2469-9950}},
language = {{eng}},
number = {{1}},
publisher = {{American Physical Society}},
series = {{Physical Review B}},
title = {{Gadolinium as an accelerator for reaching thermal equilibrium and its influence on the ground state of Dy2GdN@ C80 single-molecule magnets}},
url = {{http://dx.doi.org/10.1103/PhysRevB.103.014404}},
doi = {{10.1103/PhysRevB.103.014404}},
volume = {{103}},
year = {{2021}},
}