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L-alanine requires more insight in terms of the optoelectronic properties as the organic devices. For that an electronic structure of the L-alanine using the density of state (DOS) and band structure have been calculated by the density functional theory (DFT) using the plane wave method. The unit cell crystal, single molecule and hydrogen bonding approach were investigated first in this work using GGA-PAW. The molecular orbitals were also examined using BL3YP functional for the hydrogen bonding between the amine and the carboxylic groups and found the bandgap energy comparable to the GGA-PAW case. The indirect band gap was obtained in the band-structure calculation. The effect of three linear molecules in x, y and z direction in a crystal was investigated and the significant variations found in DOS in all three cases of L-alanine. The present study predicted the longer length wire or tube structures are most useful as the outcome to make the good organic optoelectronic material.

In the present work, we have focused on crystal structure, magnetic properties, M-H curve, superparamagnetic behavior and magneto-crystalline anisotropy of soft ferrimagnetic oxides having spinel structure. Due to their unique magnetic properties such as high Curie temperature and high saturation magnetization, spinel ferrites offer opportunities for applications in different fields such as hyperthermia, targeted drug delivery, magnetic resonance, microstrip antenna. Various applications of these ferrites have been discussed and explored due to possibility nano-size material synthesis.