Eur. Phys. J. B (2012) 85: 406
https://doi.org/10.1140/epjb/e2012-30919-x

Regular Article

Metamagnetic effects in epitaxial BaFe_1.8Cr_0.2As₂ thin films

¹ IFW Dresden, P.O. Box 270116, 01171 Dresden, Germany
² Dresden University of Technology, Department of Physics, Institute for Physics of Solids, 01062 Dresden, Germany
³ TU Bergakademie Freiberg, 09596 Freiberg, Germany

^a e-mail: j.engelmann@ifw-dresden.de

Received: 25 June 2012
Accepted: 23 October 2012
Published online: 13 December 2012

Abstract

Epitaxial BaFe_1.8Cr_0.2As₂ thin films with the tetragonal c-axis perpendicular to the thin film surface were grown on (LaAlO₃)_0.3(Sr₂AlTaO₆)_0.7 (LSAT) single crystalline substrates using pulsed laser deposition (PLD). Resistive measurements indicate the existence of two transitions at temperatures of about 80 K and 40 K. The transition at 80 K is attributed to the structural transition from the high temperature tetragonal phase to the low temperature orthorhombic phase accompanied with the magnetic transition from a paramagnetic to an antiferromagnetic state as known for doped bulk systems. Below T ≈ 40 K the magnetization curves measured perpendicularly to the orthorhombic c-axis in fields up to 9 Tesla show two inflexion points indicating metamagnetic transitions.