Abstract
The magnetic domain structure of Fe 14Nd 2B single crystals has been studied from room temperature down to 4.2 K by means of the magneto-optical Kerr effect. It was found that the coercivity of different domain walls essentially depends on their type and orientation. The general expressions for the domain wall energy density γ have been performed for Fe 14Nd 2B compounds in the low-temperature region. The role of the new domain wall types in the low-temperature magnetization reversal process in FeNdB permanent magnets is discussed.
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