Field-Induced Single-Ion Magnetism Based on Spin-Phonon Relaxation in a Distorted Octahedral High-Spin Cobalt(II) Complex

Ryuta Ishikawa; Yoji Horii; Ryo Nakanishi; Shunya Ueno; Brian K. Breedlove; Masahiro Yamashita; Satoshi Kawata

doi:10.1002/ejic.201600481

Field-Induced Single-Ion Magnetism Based on Spin-Phonon Relaxation in a Distorted Octahedral High-Spin Cobalt(II) Complex

Ryuta Ishikawa, Yoji Horii, Ryo Nakanishi, Shunya Ueno, Brian K. Breedlove, Masahiro Yamashita, Satoshi Kawata

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

12 Citations (Scopus)

Abstract

The six-coordinate mononuclear high-spin cobalt(II) complex [Co(bpy)₂(ClAn)]·EtOH (1; bpy = 2,2′-bipyridine, ClAn^2–= chloranilate) and its magnetically diluted analogue [Co_0.1Zn_0.9(bpy)₂(ClAn)]·EtOH (3), in which the Co^IIcentres of 1 are partially diluted with the magnetically inactive Zn^IIcentres of [Zn(bpy)₂(ClAn)]·EtOH (2) as a diamagnetic matrix, exhibited slow magnetic relaxation in applied direct-current (DC) magnetic fields. Fits of the DC magnetic data indicate that this new field-induced single-ion magnet possesses large positive axial and significant rhombic zero-field splittings. The results of temperature-dependent and DC-magnetic-field-dependent alternating-current magnetic measurements on 1 and 3, which is a field-induced single-ion magnet, agree with those from theoretical studies, and spin relaxation occurs through two-phonon Raman and direct spin-phonon bottleneck processes of Kramers ions.

Original language	English
Pages (from-to)	3233-3239
Number of pages	7
Journal	European Journal of Inorganic Chemistry
Volume	2016
Issue number	20
DOIs	https://doi.org/10.1002/ejic.201600481
Publication status	Published - 2016 Jul

Keywords

Cobalt
Kramers ion
Magnetic properties
Single-ion magnetism
Spin-phonon relaxation
Zinc

ASJC Scopus subject areas

Inorganic Chemistry

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Field-Induced Single-Ion Magnetism Based on Spin-Phonon Relaxation in a Distorted Octahedral High-Spin Cobalt(II) Complex. / Ishikawa, Ryuta; Horii, Yoji; Nakanishi, Ryo; Ueno, Shunya; Breedlove, Brian K.; Yamashita, Masahiro; Kawata, Satoshi.

In: European Journal of Inorganic Chemistry, Vol. 2016, No. 20, 07.2016, p. 3233-3239.

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

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title = "Field-Induced Single-Ion Magnetism Based on Spin-Phonon Relaxation in a Distorted Octahedral High-Spin Cobalt(II) Complex",

abstract = "The six-coordinate mononuclear high-spin cobalt(II) complex [Co(bpy)2(ClAn)]·EtOH (1; bpy = 2,2′-bipyridine, ClAn2–= chloranilate) and its magnetically diluted analogue [Co0.1Zn0.9(bpy)2(ClAn)]·EtOH (3), in which the CoIIcentres of 1 are partially diluted with the magnetically inactive ZnIIcentres of [Zn(bpy)2(ClAn)]·EtOH (2) as a diamagnetic matrix, exhibited slow magnetic relaxation in applied direct-current (DC) magnetic fields. Fits of the DC magnetic data indicate that this new field-induced single-ion magnet possesses large positive axial and significant rhombic zero-field splittings. The results of temperature-dependent and DC-magnetic-field-dependent alternating-current magnetic measurements on 1 and 3, which is a field-induced single-ion magnet, agree with those from theoretical studies, and spin relaxation occurs through two-phonon Raman and direct spin-phonon bottleneck processes of Kramers ions.",

keywords = "Cobalt, Kramers ion, Magnetic properties, Single-ion magnetism, Spin-phonon relaxation, Zinc",

author = "Ryuta Ishikawa and Yoji Horii and Ryo Nakanishi and Shunya Ueno and Breedlove, {Brian K.} and Masahiro Yamashita and Satoshi Kawata",

note = "Funding Information: This work was partially supported by JSPS KAKENHI (Grant-in-Aid for Research Activity Start-up), Grant Number 26888017 (R. I.). We thank Dr. Takamichi Miyazaki (Technical Division, Department of Engineering, Tohoku University) for support with the ADF-STEM and EDX analyses. Publisher Copyright: {\textcopyright} 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2016",

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doi = "10.1002/ejic.201600481",

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AU - Horii, Yoji

AU - Nakanishi, Ryo

AU - Ueno, Shunya

AU - Breedlove, Brian K.

AU - Yamashita, Masahiro

AU - Kawata, Satoshi

N1 - Funding Information: This work was partially supported by JSPS KAKENHI (Grant-in-Aid for Research Activity Start-up), Grant Number 26888017 (R. I.). We thank Dr. Takamichi Miyazaki (Technical Division, Department of Engineering, Tohoku University) for support with the ADF-STEM and EDX analyses. Publisher Copyright: © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2016/7

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N2 - The six-coordinate mononuclear high-spin cobalt(II) complex [Co(bpy)2(ClAn)]·EtOH (1; bpy = 2,2′-bipyridine, ClAn2–= chloranilate) and its magnetically diluted analogue [Co0.1Zn0.9(bpy)2(ClAn)]·EtOH (3), in which the CoIIcentres of 1 are partially diluted with the magnetically inactive ZnIIcentres of [Zn(bpy)2(ClAn)]·EtOH (2) as a diamagnetic matrix, exhibited slow magnetic relaxation in applied direct-current (DC) magnetic fields. Fits of the DC magnetic data indicate that this new field-induced single-ion magnet possesses large positive axial and significant rhombic zero-field splittings. The results of temperature-dependent and DC-magnetic-field-dependent alternating-current magnetic measurements on 1 and 3, which is a field-induced single-ion magnet, agree with those from theoretical studies, and spin relaxation occurs through two-phonon Raman and direct spin-phonon bottleneck processes of Kramers ions.

AB - The six-coordinate mononuclear high-spin cobalt(II) complex [Co(bpy)2(ClAn)]·EtOH (1; bpy = 2,2′-bipyridine, ClAn2–= chloranilate) and its magnetically diluted analogue [Co0.1Zn0.9(bpy)2(ClAn)]·EtOH (3), in which the CoIIcentres of 1 are partially diluted with the magnetically inactive ZnIIcentres of [Zn(bpy)2(ClAn)]·EtOH (2) as a diamagnetic matrix, exhibited slow magnetic relaxation in applied direct-current (DC) magnetic fields. Fits of the DC magnetic data indicate that this new field-induced single-ion magnet possesses large positive axial and significant rhombic zero-field splittings. The results of temperature-dependent and DC-magnetic-field-dependent alternating-current magnetic measurements on 1 and 3, which is a field-induced single-ion magnet, agree with those from theoretical studies, and spin relaxation occurs through two-phonon Raman and direct spin-phonon bottleneck processes of Kramers ions.

KW - Cobalt

KW - Kramers ion

KW - Magnetic properties

KW - Single-ion magnetism

KW - Spin-phonon relaxation

KW - Zinc

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Field-Induced Single-Ion Magnetism Based on Spin-Phonon Relaxation in a Distorted Octahedral High-Spin Cobalt(II) Complex

Abstract

Keywords

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