When Fe ions in the ferrimagnetic cubic are replaced by Jahn-Teller (JT)-active Mn ions, the structure evolves with two-step processes. For example, the quenched cubic becomes tetragonal and JT distorted with slow cooling. However, with further slow cooling, the clustering tendency of JT-distorted Mn ions induces the formation of a checkerboard nano-self-assembly consisting of Mn-rich (tetragonal, paramagnetic) and -poor (cubic, ferrimagnetic) rods. This morphological evolution accompanies a drastic modification of ferrimagnetic properties, e.g., the magnetic coercivity changes by . The nanocheckerboard assembly with ferrimagnetic nanorods with large shape anisotropy can be a platform for ultra high-density memory devices.
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Research Article| March 30 2007
Coercivity and nanostructure in magnetic spinel
C. L. Zhang;
Y. J. Choi;
C. L. Zhang, S. Yeo, Y. Horibe, Y. J. Choi, S. Guha, M. Croft, S.-W. Cheong, S. Mori; Coercivity and nanostructure in magnetic spinel . Appl. Phys. Lett. 26 March 2007; 90 (13): 133123. https://doi.org/10.1063/1.2717568
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