Slow Magnetic Relaxation of Ni(III) Complexes toward Molecular Spin Qubits

Author:

Toshima Keiga1,Sato Tetsu1,Horii Yoji2ORCID,Sato Kazunobu3,Sugisaki Kenji3,Breedlove B. K.1,Takaishi Shinya1,Li Zhao‐Yang4,Yamashita Masahiro14

Affiliation:

1. Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Aoba-ku Sendai Miyagi 980-8578 Japan

2. Department of Chemistry Faculty of Science Nara Women's University Kitauoya-Higashimachi Nara 630-8506 Japan

3. Department of Chemistry and Materials Science Graduate School of Science Osaka Metropolitan University 3-3-138 Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan

4. School of Materials Science and Engineering Nankai University Tianjin 300350 China

Abstract

AbstractMolecule‐based magnetic materials are promising candidates for molecular spin qubits, which utilize spin relaxation behavior. Various kinds of transition metal complexes with S=1/2 have been reported to act as spin qubits with long spin‐spin relaxation times (T2). However, the spin qubit properties of low‐spin Ni(III) complexes are not as well known since Ni(III) compounds are often unstable. We report here the slow magnetic relaxation behavior and T2 values for three kinds of low‐spin Ni(III) based complexes with S=1/2 under magnetically diluted conditions. [Ni(cyclam)X2]Y (cyclam=1,4,8,11‐tetraazacyclotetradecane) with octahedral structures and [Ni(mnt)2] (mnt=maleonitriledithiolate) with a square‐planar structure underwent slow magnetic relaxations in the presence of a dc magnetic bias field. From electron spin resonance (ESR) spectroscopy, the Ni(III) complexes exhibited observable T2, indicating that Ni(III) complexes are promising candidates for use as molecule‐based spin qubits.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Inorganic Chemistry

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