Abstract
The problem of the ‘destination vector’ in a pair of Bloch equations for two exchange-coupled magnetizations is reinvestigated. It is shown that a standard form (the one familiar in spin resonance in metals) with can be transformed equivalently into another pair with the same structure of damping but with the destination vectors such that each magnetization relaxes towards its equilibrium value determined only by the external field (i.e.,Ms′=χs′H and Md′=χd′H, where the prime indicates the transformed frame). A complete list of the relations between the coefficients of the standard and transformed pairs is given.
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