Formation and decomposition of laser-deposited metastable Fe-Cr phases

Andre A. Gorbunov; Alexander A. Levin; Egbert Wieser; Lothar Bischoff; Dieter Eckert; Axel Mensch; Michael Mertig; Dirk C. Meyer; Helfried Reuther; Peter Paufler; Wolfgang Pompe

doi:10.1117/12.515617

2 September 2003 Formation and decomposition of laser-deposited metastable Fe-Cr phases

Andre A. Gorbunov, Alexander A. Levin, Egbert Wieser, Lothar Bischoff, Dieter Eckert, Axel Mensch, Michael Mertig, Dirk C. Meyer, Helfried Reuther, Peter Paufler, Wolfgang Pompe

Author Affiliations +

Proceedings Volume 5121, Laser Processing of Advanced Materials and Laser Microtechnologies; (2003) https://doi.org/10.1117/12.515617
Event: Laser Processing of Advanced Materials and Laser Microtechnologies, 2002, Moscow, Russian Federation

Abstract

Contrary to expectations to obtain a continuous series of supersaturated b.c.c. Fe-Cr solid solutions by co-deposition of both metals in cross-beam PLD, there form unusual for this materials system metastable intermetallic phases. The structure of alloys develops from a tetragonally distorted b.c.c. at low Cr-content through a face centered orthorhombic (f.c.o.) to partly ordered primitive orthorhombic (p.o.) crystal structure of the A15-like type at nearly equiatomic composition. It seems to be the first observation of an ordering of restrictedly soluble components under the bombardment of hyperthermal species in PLD. Intriguing fact is that these metastable phases are initially paramagnetic (PM) at room temperature but become ferromagnetic (FM) after annealing in a temperature range 400-500 °C or under ion bombardment. The induced PM-FM transformation in the alloys is demonstrated to be useful for formation of stable lateral magnetic microstructures.

Citation Download Citation

Andre A. Gorbunov, Alexander A. Levin, Egbert Wieser, Lothar Bischoff, Dieter Eckert, Axel Mensch, Michael Mertig, Dirk C. Meyer, Helfried Reuther, Peter Paufler, and Wolfgang Pompe "Formation and decomposition of laser-deposited metastable Fe-Cr phases", Proc. SPIE 5121, Laser Processing of Advanced Materials and Laser Microtechnologies, (2 September 2003); https://doi.org/10.1117/12.515617

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