Rapid cooling and magnetic field-induced cooperative effect for the metastable quintet state in a spin crossover complex

Z. Yu; K. Liu; J. Q. Tao; Z. J. Zhong; X. Z. You; G. G. Siu

doi:10.1063/1.123250

Rapid cooling and magnetic field-induced cooperative effect for the metastable quintet state in a spin crossover complex

Z. Yu, K. Liu, J. Q. Tao, Z. J. Zhong, X. Z. You, G. G. Siu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

30 Citations (Scopus)

Abstract

Our study shows that metastable quintet state of spin crossover complex [Fe(dpp)₂(NCS)₂] · py (dpp=dipyrido[3,2-a:2′,3′-c] phenazine, py=pyridine) at low temperatures may be realized by a rapid cooling. The relaxation from quintet state to singlet spin at low temperatures depends on the both of time and previous history of the sample. The U-shaped dents of the magnetic effective moment depending on the temperature after initial rapid zero-field cooling indicate an obvious affection of magnetic field to the realization of singlet state in the transition range. The observations for this sample are indeed consistent with the fact that cooperative effects play a very important role in the spin transition. © 1999 American Institute of Physics.

Original language	English
Pages (from-to)	4029-4031
Journal	Applied Physics Letters
Volume	74
Issue number	26
DOIs	https://doi.org/10.1063/1.123250
Publication status	Published - 28 Jun 1999

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

This work was supported by the National Science Foundation of Jiangsu Province and by the National Science Foundation of the People’s Republic of China. Work at The Johns Hopkins University has been supported by NSF Grant No. INT9600472.

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title = "Rapid cooling and magnetic field-induced cooperative effect for the metastable quintet state in a spin crossover complex",

abstract = "Our study shows that metastable quintet state of spin crossover complex [Fe(dpp)2(NCS)2] · py (dpp=dipyrido[3,2-a:2′,3′-c] phenazine, py=pyridine) at low temperatures may be realized by a rapid cooling. The relaxation from quintet state to singlet spin at low temperatures depends on the both of time and previous history of the sample. The U-shaped dents of the magnetic effective moment depending on the temperature after initial rapid zero-field cooling indicate an obvious affection of magnetic field to the realization of singlet state in the transition range. The observations for this sample are indeed consistent with the fact that cooperative effects play a very important role in the spin transition. {\textcopyright} 1999 American Institute of Physics.",

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AU - Yu, Z.

AU - Liu, K.

AU - Tao, J. Q.

AU - Zhong, Z. J.

AU - You, X. Z.

AU - Siu, G. G.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

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N2 - Our study shows that metastable quintet state of spin crossover complex [Fe(dpp)2(NCS)2] · py (dpp=dipyrido[3,2-a:2′,3′-c] phenazine, py=pyridine) at low temperatures may be realized by a rapid cooling. The relaxation from quintet state to singlet spin at low temperatures depends on the both of time and previous history of the sample. The U-shaped dents of the magnetic effective moment depending on the temperature after initial rapid zero-field cooling indicate an obvious affection of magnetic field to the realization of singlet state in the transition range. The observations for this sample are indeed consistent with the fact that cooperative effects play a very important role in the spin transition. © 1999 American Institute of Physics.

AB - Our study shows that metastable quintet state of spin crossover complex [Fe(dpp)2(NCS)2] · py (dpp=dipyrido[3,2-a:2′,3′-c] phenazine, py=pyridine) at low temperatures may be realized by a rapid cooling. The relaxation from quintet state to singlet spin at low temperatures depends on the both of time and previous history of the sample. The U-shaped dents of the magnetic effective moment depending on the temperature after initial rapid zero-field cooling indicate an obvious affection of magnetic field to the realization of singlet state in the transition range. The observations for this sample are indeed consistent with the fact that cooperative effects play a very important role in the spin transition. © 1999 American Institute of Physics.

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DO - 10.1063/1.123250

M3 - RGC 21 - Publication in refereed journal

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

ER -

Rapid cooling and magnetic field-induced cooperative effect for the metastable quintet state in a spin crossover complex

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