Studies of Hysteresis and Quantum Tunnelling of the Magnetisation in Dysprosium(III) Single Molecule MagnetsCitation formats

  • External authors:
  • Fabrizio Ortu
  • You-song Ding
  • Conrad Alexander Phillip Goodwin
  • Matthew Gregson
  • Yan-zhen Zheng
  • Nicholas F Chilton

Standard

Studies of Hysteresis and Quantum Tunnelling of the Magnetisation in Dysprosium(III) Single Molecule Magnets. / Ortu, Fabrizio; Reta, Daniel; Ding, You-song; Goodwin, Conrad Alexander Phillip; Gregson, Matthew; Mcinnes, Eric J L; Winpenny, Richard E. P.; Zheng, Yan-zhen; Liddle, Stephen; Mills, David P; Chilton, Nicholas F.

In: Dalton Transactions, 2019.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex

@article{5c4353b51d5048bbaeba49c37e7022f7,
title = "Studies of Hysteresis and Quantum Tunnelling of the Magnetisation in Dysprosium(III) Single Molecule Magnets",
abstract = "We report magnetic hysteresis studies of three Dy(III) single-molecule magnets (SMMs). The three compounds are [Dy(tBuO)Cl(THF)5][BPh4] (1), [K(18-crown-6-ether)(THF)2][Dy(BIPM)2] (2, BIPM = C{PPh2NSiMe3}2), and [Dy(Cpttt)2][B(C6F5)4] (3), chosen as they have large energy barriers to magnetisation reversal of 665, 565, and 1223 cm-1, respectively. There are zero-field steps in the hysteresis loops of all three compounds, that remain in magnetically dilute samples and in samples that are isotopically enriched with 164Dy, which has no nuclear spin. These results demonstrate that neither dipolar fields nor nuclear hyperfine coupling are solely responsible for the quantum tunnelling of magnetisation at zero field. Analysing their vibrational modes, we find that the modes that most impact the first coordination sphere occur at the lowest energies for 1, at intermediate energies for 2 and at higher energies for 3, in correlation with the hysteresis coercive fields. Therefore, we suggest that the efficiency of quantum tunnelling of magnetisation is related to molecular flexibility.",
author = "Fabrizio Ortu and Daniel Reta and You-song Ding and Goodwin, {Conrad Alexander Phillip} and Matthew Gregson and Mcinnes, {Eric J L} and Winpenny, {Richard E. P.} and Yan-zhen Zheng and Stephen Liddle and Mills, {David P} and Chilton, {Nicholas F}",
year = "2019",
doi = "10.1039/C9DT01655D",
language = "English",
journal = "Dalton Transactions",
issn = "1477-9226",
publisher = "Royal Society of Chemistry",

}

RIS

TY - JOUR

T1 - Studies of Hysteresis and Quantum Tunnelling of the Magnetisation in Dysprosium(III) Single Molecule Magnets

AU - Ortu, Fabrizio

AU - Reta, Daniel

AU - Ding, You-song

AU - Goodwin, Conrad Alexander Phillip

AU - Gregson, Matthew

AU - Mcinnes, Eric J L

AU - Winpenny, Richard E. P.

AU - Zheng, Yan-zhen

AU - Liddle, Stephen

AU - Mills, David P

AU - Chilton, Nicholas F

PY - 2019

Y1 - 2019

N2 - We report magnetic hysteresis studies of three Dy(III) single-molecule magnets (SMMs). The three compounds are [Dy(tBuO)Cl(THF)5][BPh4] (1), [K(18-crown-6-ether)(THF)2][Dy(BIPM)2] (2, BIPM = C{PPh2NSiMe3}2), and [Dy(Cpttt)2][B(C6F5)4] (3), chosen as they have large energy barriers to magnetisation reversal of 665, 565, and 1223 cm-1, respectively. There are zero-field steps in the hysteresis loops of all three compounds, that remain in magnetically dilute samples and in samples that are isotopically enriched with 164Dy, which has no nuclear spin. These results demonstrate that neither dipolar fields nor nuclear hyperfine coupling are solely responsible for the quantum tunnelling of magnetisation at zero field. Analysing their vibrational modes, we find that the modes that most impact the first coordination sphere occur at the lowest energies for 1, at intermediate energies for 2 and at higher energies for 3, in correlation with the hysteresis coercive fields. Therefore, we suggest that the efficiency of quantum tunnelling of magnetisation is related to molecular flexibility.

AB - We report magnetic hysteresis studies of three Dy(III) single-molecule magnets (SMMs). The three compounds are [Dy(tBuO)Cl(THF)5][BPh4] (1), [K(18-crown-6-ether)(THF)2][Dy(BIPM)2] (2, BIPM = C{PPh2NSiMe3}2), and [Dy(Cpttt)2][B(C6F5)4] (3), chosen as they have large energy barriers to magnetisation reversal of 665, 565, and 1223 cm-1, respectively. There are zero-field steps in the hysteresis loops of all three compounds, that remain in magnetically dilute samples and in samples that are isotopically enriched with 164Dy, which has no nuclear spin. These results demonstrate that neither dipolar fields nor nuclear hyperfine coupling are solely responsible for the quantum tunnelling of magnetisation at zero field. Analysing their vibrational modes, we find that the modes that most impact the first coordination sphere occur at the lowest energies for 1, at intermediate energies for 2 and at higher energies for 3, in correlation with the hysteresis coercive fields. Therefore, we suggest that the efficiency of quantum tunnelling of magnetisation is related to molecular flexibility.

U2 - 10.1039/C9DT01655D

DO - 10.1039/C9DT01655D

M3 - Article

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

ER -