Spin-Peierls instabilities of antiferromagnetic rings in a magnetic field

Valeria Lante, Ioannis Rousochatzakis, K. Penc, Oliver Waldmann, Frédéric Mila

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Motivated by the intriguing properties of magnetic molecular wheels at field-induced level crossings, we investigate the spin-Peierls instability of antiferromagnetic rings in a field by exact diagonalizations of a microscopic spin model coupled to the lattice via a distortion-dependent Dzyaloshinskii-Moriya interaction. We show that, beyond the unconditional instability at level crossings for infinitesimal magnetoelastic coupling, the model is characterized by a stronger tendency to distort at higher level crossings and by a dramatic angular dependence with very sharp torque anomalies when the field is almost in the plane of the ring. These predictions are shown to compare remarkably well with available torque and nuclear magnetic resonance data on CsFe8.

Original languageEnglish
Article number180412
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number18
DOIs
Publication statusPublished - May 1 2009

Fingerprint

Torque
Magnetic fields
torque
rings
magnetic fields
Wheels
Nuclear magnetic resonance
wheels
tendencies
anomalies
nuclear magnetic resonance
predictions
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Spin-Peierls instabilities of antiferromagnetic rings in a magnetic field. / Lante, Valeria; Rousochatzakis, Ioannis; Penc, K.; Waldmann, Oliver; Mila, Frédéric.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 79, No. 18, 180412, 01.05.2009.

Research output: Contribution to journalArticle

Lante, Valeria ; Rousochatzakis, Ioannis ; Penc, K. ; Waldmann, Oliver ; Mila, Frédéric. / Spin-Peierls instabilities of antiferromagnetic rings in a magnetic field. In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 79, No. 18.
@article{7050f2bc0bfa40589fd108b737925612,
title = "Spin-Peierls instabilities of antiferromagnetic rings in a magnetic field",
abstract = "Motivated by the intriguing properties of magnetic molecular wheels at field-induced level crossings, we investigate the spin-Peierls instability of antiferromagnetic rings in a field by exact diagonalizations of a microscopic spin model coupled to the lattice via a distortion-dependent Dzyaloshinskii-Moriya interaction. We show that, beyond the unconditional instability at level crossings for infinitesimal magnetoelastic coupling, the model is characterized by a stronger tendency to distort at higher level crossings and by a dramatic angular dependence with very sharp torque anomalies when the field is almost in the plane of the ring. These predictions are shown to compare remarkably well with available torque and nuclear magnetic resonance data on CsFe8.",
author = "Valeria Lante and Ioannis Rousochatzakis and K. Penc and Oliver Waldmann and Fr{\'e}d{\'e}ric Mila",
year = "2009",
month = "5",
day = "1",
doi = "10.1103/PhysRevB.79.180412",
language = "English",
volume = "79",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Physical Society",
number = "18",

}

TY - JOUR

T1 - Spin-Peierls instabilities of antiferromagnetic rings in a magnetic field

AU - Lante, Valeria

AU - Rousochatzakis, Ioannis

AU - Penc, K.

AU - Waldmann, Oliver

AU - Mila, Frédéric

PY - 2009/5/1

Y1 - 2009/5/1

N2 - Motivated by the intriguing properties of magnetic molecular wheels at field-induced level crossings, we investigate the spin-Peierls instability of antiferromagnetic rings in a field by exact diagonalizations of a microscopic spin model coupled to the lattice via a distortion-dependent Dzyaloshinskii-Moriya interaction. We show that, beyond the unconditional instability at level crossings for infinitesimal magnetoelastic coupling, the model is characterized by a stronger tendency to distort at higher level crossings and by a dramatic angular dependence with very sharp torque anomalies when the field is almost in the plane of the ring. These predictions are shown to compare remarkably well with available torque and nuclear magnetic resonance data on CsFe8.

AB - Motivated by the intriguing properties of magnetic molecular wheels at field-induced level crossings, we investigate the spin-Peierls instability of antiferromagnetic rings in a field by exact diagonalizations of a microscopic spin model coupled to the lattice via a distortion-dependent Dzyaloshinskii-Moriya interaction. We show that, beyond the unconditional instability at level crossings for infinitesimal magnetoelastic coupling, the model is characterized by a stronger tendency to distort at higher level crossings and by a dramatic angular dependence with very sharp torque anomalies when the field is almost in the plane of the ring. These predictions are shown to compare remarkably well with available torque and nuclear magnetic resonance data on CsFe8.

UR - http://www.scopus.com/inward/record.url?scp=67649126852&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67649126852&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.79.180412

DO - 10.1103/PhysRevB.79.180412

M3 - Article

AN - SCOPUS:67649126852

VL - 79

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 18

M1 - 180412

ER -