Unformatted text preview: eponding magnetic field acts on the magnetic moment arising from the electron spin. 7-33 Bloch walls Fig. 7.18 Illustration of the spin rotation in a 180° Bloch wall. The extension of the wall is a balance of the exchange energy, which trys to avoid large missorientation of neighboring spins, and the magnetic anisotropy energy, which trys to minimize the number of spins being oriented in a direction different from that of easiest magnetization. Fe: Bloch wall thickness ≈ 40mm 7-34 Hysteresis loop Fig. 7.19 Sketch of a magnetization curve of a...
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- Spring '02
- Electron, Magnetic Field, Fundamental physics concepts, Ferromagnetism, Pauli paramagnetism