14 research outputs found
Direct Observation of Magnetic Domain and Magnetization Reversal on Prussian Blue-Based Magnetic Films
Knowledge of the magnetic domain is indispensable for
understanding
the magnetostatic properties of magnets. However, to date, the magnetic
domain has not yet been reported in the field of molecule-based magnets.
Herein, we study the magnetic domains of molecule-based magnets. Two
magnetic films of iron/chromium hexacyanidochromate FexCr1–x[Cr(CN)6]2/3·5H2O (x =
0; Film 1 and x = 0.2; Film 2) were prepared for investigation. The temperature evolution of surface
magnetization was measured using magnetic force microscopy. Film 1 showed a magnetic domain below Curie temperature (TC) and its positive-magnetic polarization increased
monotonously with decreasing temperature, while Film 2 showed positive magnetic polarization below TC and switches from positive to negative magnetization through
a demagnetization state at 146 K. This study originally reports the
temperature variation of the magnetization state at the magnetization
reversal. The magnetic domains appeared as a maze pattern with an
approximate domain size of one-to-several micrometers. This work shows
that research on molecule-based magnets can be expanded from magnetochemistry
to the magnetostatic engineering of bulk magnets, molecule-based magnetostatic
engineering