Spontaneous magnetization above TC in polycrystalline La0.7 Ca0.3 MnO3 and La0.7 Ba0.3 MnO3
journal contributionposted on 28.09.2017, 12:20 by J.A. Turcaud, A.M. Pereira, K.G. Sandeman, J.S. Amaral, Kelly MorrisonKelly Morrison, A. Berenov, A. Daoud-Aladine, L.F. Cohen
In the present work, spontaneous magnetization is observed in the inverse magnetic susceptibility of La0.7Ca0.3MnO3 and La0.7Ba0.3MnO3 compounds above TC up to a temperature T*. From information gathered from neutron diffraction, dilatometry, and high-field magnetization data, we suggest that T* is related to the transition temperature of the low-temperature (high magnetic field) magnetic phase. In the temperature region between T* and TC, the application of a magnetic field drives the system from the high-temperature to low-temperature magnetic phases, the latter possessing a higher magnetization. © 2014 American Physical Society.
This work was supported by the UK EPSRC Grant No. EP/G060940/1. K.G.S acknowledges financial support from The Royal Society.