Abstract
We study a classical double exchange magnet with direct antiferromagnetic superexchange coupling, J, between the localized spins. It is shown that the destabilization of the ferromagnetic ground state with increasing J leads to phase separation; the latter always preempts the spin-wave instability (softening of the magnon spectrum). It is also found that the boundaries separating the ferromagnetic and antiferromagnetic areas of the sample tend to be abrupt.
Original language | English |
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Pages (from-to) | 7508-7510 |
Number of pages | 3 |
Journal | Journal of Applied Physics |
Volume | 91 |
Issue number | 10 I |
DOIs | |
State | Published - 15 May 2002 |
Externally published | Yes |