Observation of antiferromagnetic coupling in δ-MnGa/(Mn,Ga,As)/δ-MnGa trilayers

Autor:	Hiroyuki Akinaga, L. H. Kuo, K. Tanaka, W. Van Roy, Shintaro Miyanishi
Rok vydání:	1997
Předmět:	Coupling (electronics) Materials science Ferromagnetism Condensed matter physics Atomic force microscopy Remanence Monolayer Antiferromagnetism Condensed Matter Physics Layer (electronics) Antiferromagnetic coupling Electronic Optical and Magnetic Materials
Zdroj:	Journal of Magnetism and Magnetic Materials. 165:149-152
ISSN:	0304-8853
DOI:	10.1016/s0304-8853(96)00491-x
Popis:	We present the magnetic properties of δ-MnGa/(Mn,Ga,As)/δ-MnGa trilayers. The spacer layer consists of nominally 2 to 19 monolayers (ML) GaAs, but we have indications for an important incorporation of Mn and the possible formation of antiferromagnetic Mn 2 As. Antiferromagnetic (AFM) coupling is observed for spacer layer thicknesses of 4 to 14 ML GaAs, ferromagnetic (FM) coupling exists outside this region. The largest observed coupling field was −87.0 mT (−870 Oe) at 17 K for a sample with a 12 ML spacer layer, causing a cross-over between both branches of the hysteresis loop and a negative remanence. In one sample (16 ML) the coupling changes from AFM at low temperature to FM at room temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::72e15b32e1d50bf70f0f805e2ef8341c https://doi.org/10.1016/s0304-8853(96)00491-x Zobrazit plný text záznamu Full Text from ScienceDirect