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Metal Organic Frameworks as Tunable Linear Magnets
Author(s) -
Son Kwanghyo,
Kim Rae Kyung,
Kim Suhwan,
Schütz Gisela,
Choi Kyung Min,
Oh Hyunchul
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201901000
Subject(s) - superparamagnetism , spintronics , antiferromagnetism , ferromagnetism , materials science , magnetization , magnetic moment , condensed matter physics , magnet , magnetic susceptibility , metal organic framework , nanotechnology , remanence , magnetic field , chemical physics , chemistry , adsorption , physics , quantum mechanics
Due to the tunable magnetic exchange interactions between nearest neighbor moment carriers by exchange linker length or metal ions, metal–organic frameworks (MOFs) in general, and MOF‐74 in particular, have promising magnetic properties for novel industrial applications such as magnetic switchers, sensors, and multifunction devices in molecular spintronics. Hence, MOF‐74‐M [M 2 (C 8 H 2 O 6 )] (M = Fe, Co, Ni) possessing a 1D channel is prepared and experimentally examined to describe its diverse magnetic properties, depending on the metal cluster used. By exchanging the metal ion (Fe, Co, and Ni) in the metal cluster, the magnetic state of MOF‐74 is changed from ferromagnetic or antiferromagnetic to superparamagnetic. This phenomenon can be also confirmed by alternating current (AC)/direct current (DC) magnetic susceptibility and field‐dependent magnetization. Therefore, the intrinsic magnetic properties of MOF‐74‐M such as blocking temperature, Néel temperature, and interaction energy between metals in magnetic susceptibility tests can be elucidated. Moreover, the superparamagnetic behavior in this system is also observed in M – H curves and magnetic dynamics as single‐chain magnets. It is believed that MOF‐74‐M can be utilized for applications in which superconducting materials are required (e.g., memory‐storage devices).