Definition of Magnetic Exchange Length

Journal Article · Thu Aug 01 00:00:00 EDT 2013 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/TMAG.2013.2258028· OSTI ID:1211426

Abo, GS; Hong, YK; Park, J; Lee, J; Lee, W; Choi, BC

The magnetostatic exchange length is an important parameter in magnetics as it measures the relative strength of exchange and self-magnetostatic energies. Its use can be found in areas of magnetics including micromagnetics, soft and hard magnetic materials, and information storage. The exchange length is of primary importance because it governs the width of the transition between magnetic domains. Unfortunately, there is some confusion in the literature between the magnetostatic exchange length and a similar distance concerning magnetization reversal mechanisms in particles known as the characteristic length. This confusion is aggravated by the common usage of two different systems of units, SI and cgs. This paper attempts to clarify the situation and recommends equations in both systems of units.

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: DE-AR0000189
• OSTI ID: 1211426
• Journal Information: IEEE Transactions on Magnetics, Vol. 49, Issue 8; ISSN 0018-9464
• Country of Publication: United States
• Language: English