%0 Journal Article
%A Georgalas, C.
%A Samartzis, A.
%A Biniskos, Nikolaos
%A Syskakis, E.
%T Effects of Cr-doping on the Jahn-Teller, the orthorhombic to rhombohedral, and the magnetic transitions in LaMn1-xCrxO3 compounds
%J Physica / B
%V 586
%@ 0921-4526
%C Amsterdam
%I Elsevier
%M FZJ-2020-01403
%P 412101 -
%D 2020
%Z Bitte Post-Print ergänzen
%X We report on the electrical resistivity, the specific heat, and differential thermal analysis of LaMn1-xCrxO3 (x=0.00-0.35) polycrystalline compounds at T>300 K, as well as on their magnetic properties in the temperature range from 80 K to 280 K. The transport and the thermal results show that the isovalent substitution of Mn3+ by Cr3+ decreases the cooperative Jahn-Teller distortion and consequently affects orbital ordering in the whole concentration range. It is found that Cr drastically reduces the entropy change associated to the Jahn-Teller transition to negligible values for x≥0.20. The orthorhombic to rhombohedral transition is also displaced to lower temperatures by Cr-doping, however exhibiting non-zero associated enthalpy changes for all x. A ferromagnetic contribution develops in orbitally disordered alloys with x≥0.20. The paramagnetic to ferromagnetic transition temperatures show a similar variation upon increasing x as for the LaMn1-xGaxO3 system, implying a common origin for the ferromagnetic interaction in both systems.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1016/j.physb.2020.412101
%U https://juser.fz-juelich.de/record/874383