Critical slowing down of the spin dynamics in antiferromagnetic rings

D. Procissi; B. J. Suh; E. Micotti; A. Lascialfari; Y. Furukawa; F. Borsa

doi:10.1016/j.jmmm.2003.12.1262

Critical slowing down of the spin dynamics in antiferromagnetic rings

D. Procissi^*, B. J. Suh, E. Micotti, A. Lascialfari, Y. Furukawa, F. Borsa

^*Corresponding author for this work

Radiology

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

8 Scopus citations

Abstract

We report ¹H nuclear magnetic resonance spin-lattice relaxation rates T^-1₁ vs. T at different magnetic field values, for molecular antiferromagnetic (AFM) rings with S_Total = 0 singlet ground state. New results in {CsFe8}, {Cr8} and {Fe6} are compared with previous results in {Fe6} and {Fe10}. In all cases a strong enhancement of T ₁^-1 was observed with a maximum occurring at some temperature T₀ which is found to be field dependent. It is shown that the critical enhancement appears to be a robust universal feature in these AFM rings for which a general theory is still lacking.

Original language	English (US)
Pages (from-to)	e741-e742
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.1262
State	Published - May 2004

Keywords

Molecular antiferromagnetic rings
Nuclear magnetic resonance
Nuclear spin lattice relaxation rate
Spin-spin correlation function

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2003.12.1262

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title = "Critical slowing down of the spin dynamics in antiferromagnetic rings",

abstract = "We report 1H nuclear magnetic resonance spin-lattice relaxation rates T-11 vs. T at different magnetic field values, for molecular antiferromagnetic (AFM) rings with STotal = 0 singlet ground state. New results in {CsFe8}, {Cr8} and {Fe6} are compared with previous results in {Fe6} and {Fe10}. In all cases a strong enhancement of T 1-1 was observed with a maximum occurring at some temperature T0 which is found to be field dependent. It is shown that the critical enhancement appears to be a robust universal feature in these AFM rings for which a general theory is still lacking.",

keywords = "Molecular antiferromagnetic rings, Nuclear magnetic resonance, Nuclear spin lattice relaxation rate, Spin-spin correlation function",

author = "D. Procissi and Suh, {B. J.} and E. Micotti and A. Lascialfari and Y. Furukawa and F. Borsa",

note = "Funding Information: We would like to acknowledge fruitful discussion with M. Luban and C. Shr{\"o}eder. Ames Lab is operated for the US Department of Energy by Iowa State University under contract No. W-7405-Eng-82 . ",

year = "2004",

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doi = "10.1016/j.jmmm.2003.12.1262",

language = "English (US)",

volume = "272-276",

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journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

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number = "SUPPL. 1",

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TY - JOUR

T1 - Critical slowing down of the spin dynamics in antiferromagnetic rings

AU - Procissi, D.

AU - Suh, B. J.

AU - Micotti, E.

AU - Lascialfari, A.

AU - Furukawa, Y.

AU - Borsa, F.

N1 - Funding Information: We would like to acknowledge fruitful discussion with M. Luban and C. Shröeder. Ames Lab is operated for the US Department of Energy by Iowa State University under contract No. W-7405-Eng-82 .

PY - 2004/5

Y1 - 2004/5

N2 - We report 1H nuclear magnetic resonance spin-lattice relaxation rates T-11 vs. T at different magnetic field values, for molecular antiferromagnetic (AFM) rings with STotal = 0 singlet ground state. New results in {CsFe8}, {Cr8} and {Fe6} are compared with previous results in {Fe6} and {Fe10}. In all cases a strong enhancement of T 1-1 was observed with a maximum occurring at some temperature T0 which is found to be field dependent. It is shown that the critical enhancement appears to be a robust universal feature in these AFM rings for which a general theory is still lacking.

AB - We report 1H nuclear magnetic resonance spin-lattice relaxation rates T-11 vs. T at different magnetic field values, for molecular antiferromagnetic (AFM) rings with STotal = 0 singlet ground state. New results in {CsFe8}, {Cr8} and {Fe6} are compared with previous results in {Fe6} and {Fe10}. In all cases a strong enhancement of T 1-1 was observed with a maximum occurring at some temperature T0 which is found to be field dependent. It is shown that the critical enhancement appears to be a robust universal feature in these AFM rings for which a general theory is still lacking.

KW - Molecular antiferromagnetic rings

KW - Nuclear magnetic resonance

KW - Nuclear spin lattice relaxation rate

KW - Spin-spin correlation function

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DO - 10.1016/j.jmmm.2003.12.1262

M3 - Article

AN - SCOPUS:11144270849

SN - 0304-8853

VL - 272-276

SP - e741-e742

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - SUPPL. 1

ER -

Critical slowing down of the spin dynamics in antiferromagnetic rings

Abstract

Keywords

ASJC Scopus subject areas

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