Investigating the occurrence of magnetic order in strained thin films of Pr0.5Ca0.5MnO3 by muon spin relaxationI. Komissarov1, Y. Zhang1, 2, G. J. Nieuwenhuys1, 3, E. Morenzoni3, T. Prokscha3, A. Suter3 and J. Aarts1
1 Kamerlingh Onnes Laboratory, Leiden University - Leiden, The Netherlands, EU
2 Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academic of Science - 72 Wenhua Road, Shenyang 110016, PRC
3 Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute - CH-5232 Villigen PSI, Switzerland
received 28 March 2008; accepted in final form 30 June 2008; published August 2008
published online 19 August 2008
We measured the antiferromagnetic transition temperature T in a thin film (25 nm) of Pr0.5Ca0.5MnO3 (PCMO) on SrTiO3 (STO), which also shows charge and orbital order. The tensile strain was shown earlier to yield a considerable increase of the charge order temperature. Here we measure the spin depolarization rate of low-energy muons, and find that the onset of magnetic order in such a strained film is at the same temperature as T of the bulk material, from which we infer that strain has not changed the magnetic order. This is in very good agreement with the general theoretical understanding of the physics of manganites at half-filling.
73.50.-h - Electronic transport phenomena in thin films.
75.47.Gk - Colossal magnetoresistance.
© EPLA 2008