JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 卷:322 |
Growth mode, magnetic and magneto-optical properties of pulsed-laser-deposited Au/Co/Au (111) trilayers | |
Article | |
Clavero, C.1  Cebollada, A.1  Armelles, G.1  Fruchart, O.2,3  | |
[1] CNM CSIC, IMM, Madrid 28760, Spain | |
[2] CNRS, Inst Neel, F-38042 Grenoble, France | |
[3] UJF, F-38042 Grenoble 9, France | |
关键词: Pulsed laser deposition; Crystal growth; Magnetism; Magneto-optics; | |
DOI : 10.1016/j.jmmm.2009.10.032 | |
来源: Elsevier | |
【 摘 要 】
The growth mode, magnetic and magneto-optical properties of epitaxial Au/Co/Au(1 1 1) ultrathin trilayers grown by pulsed-laser deposition (PLD) under ultra-high vacuum are presented. Sapphire wafers buffered with a single-crystalline Mo(1 1 0) buffer layer were used as substrates. Owing to PLD induced interfacial inter mixing at the lower Co/Au(111) interface, a close-to layer-by-layer growth mode is promoted. Surprisingly, despite this intermixing, ferromagnetic behavior is found at room temperature for coverings starting at 1 atomic layer (AL). The films display perpendicular magnetization with an isotropy constants reduced by 50% compared to TD-grown or electrodeposited films, and with a coercivity more than one order of magnitude lower (less than or similar to 5mT). The magneto-optical (MO) response in the low Co thickness range is dominated by Au/Co interface contributions. For thicknesses starting at 3 AL Co, the MO response has a linear dependence with the Co thickness, indicative of a continuous-film-like MO behavior. (C) 2009 Elsevier B. V. All rights reserved.
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