Search for Dimensional Effects in Spin-Glass Transition in Thin Cd1-xMnxTe Multilayers |
| M. Sawicki, T. Dietl, T. Skośkiewicz, G. Karczewski, T. Wojtowicz and J. Kossut Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland |
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| SQUID magnetic measurements of CdTe/Cd1-xMnxTe, x ≃ 0.5, multi-layers with different CdMnTe layer thickness w reveal the persistence of the spin-glass irreversibilities down to ≃ 16 Å thin layers, i.e., well beyond the previously postulated 40 Å as a quasi-2D threshold. The freezing temperature Tf is found to be a monotonic function of w, and it obeys a scaling law Tf ∝ wa, with a 0.8 similar to that for canonical spin-glasses. Magnetic properties of all studied structures are found to be independent of the orientation of the magnetic field. |
| DOI: 10.12693/APhysPolA.88.1038 PACS numbers: 75.50.-y, 75.50.Lk, 75.50.Rr, 75.30.Kz |