The Coulomb Interaction and Volume Compression Effect on Spin and Orbital Magnetic Moment of NiO

Authors: Thassana, Chewa; Techitdheera, Wicharn

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 12, December 2011 , pp. 10900-10903(4)

Publisher: American Scientific Publishers

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Abstract:

This calculation focuses on the effect of the Coulomb interaction U and the volume compression (VC) on both spin (m s) and orbital (m o) magnetic moment of NiO by using the local spin density approximation plus the Coulomb interaction (LSDA+U) method within full potential linear muffin-tin orbital (FP-LMTO). Our calculated results indicated that both spin and orbital magnetic moment strongly correlated to U and VC. The relevant results exhibited the increasing spin and orbital magnetic moments with increasing Coulomb interaction and decreasing volume compression. The interesting behavior appears when volume compression is greater than 70% at which m s collapses whereas m o linearly decreases. Further increase of volume compression to be at 80% leads to the disappearance of both magnetic moments. The present results exhibit the good correspondence to the experimental data at the normal pressure and U value of 6 eV.

Keywords: COULOMB INTERACTION U; LSDA + U; NIO; SPIN AND ORBITAL MAGNETIC MOMENT; VOLUME COMPRESSION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4101

Publication date: December 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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