Eur. Phys. J. B (2013) 86: 409
https://doi.org/10.1140/epjb/e2013-40632-y

Regular Article

The low temperature magnetic phase diagram of Eu_xSr_1−xTiO₃

¹ Physik-Institut der Universität Zürich, Winterthurerstr. 190, 8057 Zürich, Switzerland
² Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569 Stuttgart, Germany

^a e-mail: a.bussmann-holder@fkf.mpg.de

Received: 28 June 2013
Received in final form: 31 July 2013
Published online: 1 October 2013

Abstract

Specific heat and magnetization measurements demonstrate that the antiferromagnetic (AFM) phase transition at T_N = 5.7 K of EuTiO₃ is rapidly suppressed with Sr doping in Eu_xSr_1−xTiO₃. Close to x = 0.25, T_N = 0 K and AFM order vanishes. Above this critical concentration a finite transition temperature to an AFM phase is observed. The exchange couplings are derived as a function of x and the corresponding low temperature phase diagram is presented.