Hydrostatic pressure effect on electrical and magnetic properties of electron-doped R0.16Ca0.84MnO3 (R=Pr, Gd, Eu)

The compounds Eu0.16Ca0.84MnO3 and Gd0.16Ca0.84MnO3 below Tt are in a mixed magnetic state with coexisting ferro- and antiferromagnetic exchange interactions. The weak pressure effect on Tt for Eu0.16Ca0.84MnO3 does not correlate with the record of the magnetoresistance effect of electron-doped compounds. Considering the obtained applied pressure data, the role of interatomic distances in the formation of CMR effect for electron-doped orthomanganites is discussed.