Magnetic Phase Control in Monolayer Films by Substrate Tuning

Details Magnetic Phase Control in Monolayer Films by Substrate Tuning Magnetic Phase Control in Monolayer Films by Substrate Tuning

2007-01-11

arxiv.org/abs/cond-mat/0701241v2

Physical Review Letters 99, 187203 (2007)

Physics

Condensed Matter

Materials Science

after minor changes, 5 pages, 5 figures, revtex4

Scientific paper

10.1103/PhysRevLett.99.187203

We propose to tailor exchange interactions in magnetic monolayer films by tuning the adjacent non-magnetic substrate. As an example, we demonstrate a ferromagnetic-antiferromagnetic phase transition for one monolayer Fe on a Ta(x)W(1-x)(001) surface as a function of the Ta concentration. At the critical Ta concentration, the nearest-neighbor exchange interaction is small and the magnetic phase space is dramatically broadened. Complex magnetic order such as spin-spirals, multiple-Q, or even disordered local moment states can occur, offering the possibility to store information in terms of ferromagnetic dots in an otherwise zero-magnetization state matrix.

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