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<h2 class="hd hd-2 unit-title">An Introduction and Magnetic Domains</h2>
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<h2 class="hd hd-2 unit-title">Magnetocrystalline Anisotropy</h2>
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<h2 class="hd hd-2 unit-title">Shape Anisotropy</h2>
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<h2 class="hd hd-2 unit-title">Domain Wall Energy</h2>
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<p>Explain why a magnetic particle forms domains.</p>
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