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

Autor:	Brian K. Breedlove, Satoshi Kawata, Shunya Ueno, Ryo Nakanishi, Masahiro Yamashita, Ryuta Ishikawa, Yoji Horii
Rok vydání:	2016
Předmět:	Magnetism 010405 organic chemistry Relaxation (NMR) chemistry.chemical_element 010402 general chemistry 01 natural sciences Ion Magnetic field 0104 chemical sciences Inorganic Chemistry Crystallography Nuclear magnetic resonance chemistry Magnet Diamagnetism Spin (physics) Cobalt
Zdroj:	European Journal of Inorganic Chemistry. 2016:3233-3239
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.201600481
Popis:	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 CoII centres of 1 are partially diluted with the magnetically inactive ZnII centres 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.
Databáze:	OpenAIRE
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