11f223416c
- added a cubic anisotropy in fix_precession_spin - added associated doc and examples - corrected neb/spin commands in doc/src/ - added tools/spin/ description
22 lines
744 B
TeX
22 lines
744 B
TeX
\documentclass[preview]{standalone}
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\usepackage{varwidth}
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\usepackage[utf8x]{inputenc}
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\usepackage{amsmath,amssymb,amsthm,bm}
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\begin{document}
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\begin{varwidth}{50in}
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\begin{equation}
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\bm{H}_{cubic} = -\sum_{{ i}=1}^{N} K_{1}
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\Big[
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\left(\vec{s}_{i} \cdot \vec{n1} \right)^2
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\left(\vec{s}_{i} \cdot \vec{n2} \right)^2 +
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\left(\vec{s}_{i} \cdot \vec{n2} \right)^2
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\left(\vec{s}_{i} \cdot \vec{n3} \right)^2 +
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\left(\vec{s}_{i} \cdot \vec{n1} \right)^2
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\left(\vec{s}_{i} \cdot \vec{n3} \right)^2 \Big]
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+K_{2}^{(c)} \left(\vec{s}_{i} \cdot \vec{n1} \right)^2
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\left(\vec{s}_{i} \cdot \vec{n2} \right)^2
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\left(\vec{s}_{i} \cdot \vec{n3} \right)^2 \nonumber
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\end{equation}
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\end{varwidth}
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\end{document}
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