Magnetic relaxation in V15 cluster: Direct spin-phonon transitions

Alex Tarantul; Boris Tsukerblat

doi:10.1016/j.ica.2010.07.080

Magnetic relaxation in V₁₅ cluster: Direct spin-phonon transitions

Alex Tarantul, Boris Tsukerblat

Department of Chemistry

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

13 Scopus citations

Abstract

In this article we propose a model of spin-vibronic relaxation in K ₆[V^IV₁₅As₆O₄₂(H ₂O)]·8H₂O, the so called V₁₅ cluster exhibiting the unique layered structure. The work is motivated by the recent observation of the Rabi oscillation [1] in this system and aimed to elucidate the nature of the relaxation processes. The model assumes that the spin-phonon coupling arises as a result of modulation of the isotropic and antisymmetric (Dzyaloshinsky-Moriya) exchange interactions in the central triangular layer of vanadium ions by the acoustic lattice vibrations. Within the pseudo-angular momentum representation the selection rules for the direct (one-phonon) transitions between Zeeman levels are derived and a special role of the antisymmetric exchange is underlined. The relaxation times related to one-phonon transitions in different ranges of the field are estimated within the Debye model for the lattice vibrations.

Original language	English
Pages (from-to)	4361-4367
Number of pages	7
Journal	Inorganica Chimica Acta
Volume	363
Issue number	15
DOIs	https://doi.org/10.1016/j.ica.2010.07.080
State	Published - 10 Dec 2010

Keywords

Antisymmetric exchange
Coherence
Exchange interaction
Molecular magnetism
Spin-phonon relaxation

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.ica.2010.07.080

Cite this

@article{c30731dc41e64d43baf0435d903f0a80,

title = "Magnetic relaxation in V15 cluster: Direct spin-phonon transitions",

abstract = "In this article we propose a model of spin-vibronic relaxation in K 6[VIV15As6O42(H 2O)]·8H2O, the so called V15 cluster exhibiting the unique layered structure. The work is motivated by the recent observation of the Rabi oscillation [1] in this system and aimed to elucidate the nature of the relaxation processes. The model assumes that the spin-phonon coupling arises as a result of modulation of the isotropic and antisymmetric (Dzyaloshinsky-Moriya) exchange interactions in the central triangular layer of vanadium ions by the acoustic lattice vibrations. Within the pseudo-angular momentum representation the selection rules for the direct (one-phonon) transitions between Zeeman levels are derived and a special role of the antisymmetric exchange is underlined. The relaxation times related to one-phonon transitions in different ranges of the field are estimated within the Debye model for the lattice vibrations.",

keywords = "Antisymmetric exchange, Coherence, Exchange interaction, Molecular magnetism, Spin-phonon relaxation",

author = "Alex Tarantul and Boris Tsukerblat",

note = "Funding Information: This work is done under the auspices of the Israel Science Foundation (ISF) whose financial support is gratefully acknowledged (Grant No. 168/09 ). ",

year = "2010",

month = dec,

day = "10",

doi = "10.1016/j.ica.2010.07.080",

language = "English",

volume = "363",

pages = "4361--4367",

journal = "Inorganica Chimica Acta",

issn = "0020-1693",

publisher = "Elsevier B.V.",

number = "15",

}

TY - JOUR

T1 - Magnetic relaxation in V15 cluster

T2 - Direct spin-phonon transitions

AU - Tarantul, Alex

AU - Tsukerblat, Boris

N1 - Funding Information: This work is done under the auspices of the Israel Science Foundation (ISF) whose financial support is gratefully acknowledged (Grant No. 168/09 ).

PY - 2010/12/10

Y1 - 2010/12/10

N2 - In this article we propose a model of spin-vibronic relaxation in K 6[VIV15As6O42(H 2O)]·8H2O, the so called V15 cluster exhibiting the unique layered structure. The work is motivated by the recent observation of the Rabi oscillation [1] in this system and aimed to elucidate the nature of the relaxation processes. The model assumes that the spin-phonon coupling arises as a result of modulation of the isotropic and antisymmetric (Dzyaloshinsky-Moriya) exchange interactions in the central triangular layer of vanadium ions by the acoustic lattice vibrations. Within the pseudo-angular momentum representation the selection rules for the direct (one-phonon) transitions between Zeeman levels are derived and a special role of the antisymmetric exchange is underlined. The relaxation times related to one-phonon transitions in different ranges of the field are estimated within the Debye model for the lattice vibrations.

AB - In this article we propose a model of spin-vibronic relaxation in K 6[VIV15As6O42(H 2O)]·8H2O, the so called V15 cluster exhibiting the unique layered structure. The work is motivated by the recent observation of the Rabi oscillation [1] in this system and aimed to elucidate the nature of the relaxation processes. The model assumes that the spin-phonon coupling arises as a result of modulation of the isotropic and antisymmetric (Dzyaloshinsky-Moriya) exchange interactions in the central triangular layer of vanadium ions by the acoustic lattice vibrations. Within the pseudo-angular momentum representation the selection rules for the direct (one-phonon) transitions between Zeeman levels are derived and a special role of the antisymmetric exchange is underlined. The relaxation times related to one-phonon transitions in different ranges of the field are estimated within the Debye model for the lattice vibrations.

KW - Antisymmetric exchange

KW - Coherence

KW - Exchange interaction

KW - Molecular magnetism

KW - Spin-phonon relaxation

UR - http://www.scopus.com/inward/record.url?scp=78649472939&partnerID=8YFLogxK

U2 - 10.1016/j.ica.2010.07.080

DO - 10.1016/j.ica.2010.07.080

M3 - Article

AN - SCOPUS:78649472939

SN - 0020-1693

VL - 363

SP - 4361

EP - 4367

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

IS - 15

ER -