Tm(III) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects

A. Amjad; A. Figuerola; L. Sorace

doi:10.1039/C6DT04691F

Tm(III) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects

A. Amjad, A. Figuerola, L. Sorace^*

^*Corresponding author for this work

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

15 Scopus citations

Abstract

The present study focuses on the dynamic magnetic behaviour of exchange coupled 3d-4f complexes containing the scarcely investigated non-Kramers Tm³⁺ center, the 3d metal ions being either the low-spin Fe³⁺ (1) or the diamagnetic Co³⁺ (2) ion. Both complexes display field-induced slow relaxation of magnetization. The field and temperature dependences of the relaxation rate provided indication of relevant contributions from quantum tunnelling, direct, Orbach and Raman processes, with only minor effects from exchange coupling interactions. Furthermore, the aged sample of 2 exhibited an additional relaxation process, possibly due to structural modifications accompanied by solvent loss, highlighting the importance of a careful consideration of this factor when analysing the magnetization dynamics in solvated systems.

Original language	English (US)
Pages (from-to)	3848-3856
Number of pages	9
Journal	Dalton transactions
Volume	46
Issue number	12
DOIs	https://doi.org/10.1039/C6DT04691F
State	Published - 2017
Externally published	Yes

ASJC Scopus subject areas

Inorganic Chemistry

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title = "Tm(III) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects",

abstract = "The present study focuses on the dynamic magnetic behaviour of exchange coupled 3d-4f complexes containing the scarcely investigated non-Kramers Tm3+ center, the 3d metal ions being either the low-spin Fe3+ (1) or the diamagnetic Co3+ (2) ion. Both complexes display field-induced slow relaxation of magnetization. The field and temperature dependences of the relaxation rate provided indication of relevant contributions from quantum tunnelling, direct, Orbach and Raman processes, with only minor effects from exchange coupling interactions. Furthermore, the aged sample of 2 exhibited an additional relaxation process, possibly due to structural modifications accompanied by solvent loss, highlighting the importance of a careful consideration of this factor when analysing the magnetization dynamics in solvated systems.",

author = "A. Amjad and A. Figuerola and L. Sorace",

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T1 - Tm(III) complexes undergoing slow relaxation of magnetization

T2 - exchange coupling and aging effects

AU - Amjad, A.

AU - Figuerola, A.

AU - Sorace, L.

PY - 2017

Y1 - 2017

N2 - The present study focuses on the dynamic magnetic behaviour of exchange coupled 3d-4f complexes containing the scarcely investigated non-Kramers Tm3+ center, the 3d metal ions being either the low-spin Fe3+ (1) or the diamagnetic Co3+ (2) ion. Both complexes display field-induced slow relaxation of magnetization. The field and temperature dependences of the relaxation rate provided indication of relevant contributions from quantum tunnelling, direct, Orbach and Raman processes, with only minor effects from exchange coupling interactions. Furthermore, the aged sample of 2 exhibited an additional relaxation process, possibly due to structural modifications accompanied by solvent loss, highlighting the importance of a careful consideration of this factor when analysing the magnetization dynamics in solvated systems.

AB - The present study focuses on the dynamic magnetic behaviour of exchange coupled 3d-4f complexes containing the scarcely investigated non-Kramers Tm3+ center, the 3d metal ions being either the low-spin Fe3+ (1) or the diamagnetic Co3+ (2) ion. Both complexes display field-induced slow relaxation of magnetization. The field and temperature dependences of the relaxation rate provided indication of relevant contributions from quantum tunnelling, direct, Orbach and Raman processes, with only minor effects from exchange coupling interactions. Furthermore, the aged sample of 2 exhibited an additional relaxation process, possibly due to structural modifications accompanied by solvent loss, highlighting the importance of a careful consideration of this factor when analysing the magnetization dynamics in solvated systems.

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VL - 46

SP - 3848

EP - 3856

JO - Dalton transactions

JF - Dalton transactions

IS - 12

ER -

Tm(III) complexes undergoing slow relaxation of magnetization: exchange coupling and aging effects

Abstract

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