Modulation of persistent magnetoresistance by piezo-strain effect in manganite-based heterostructures

作者：Li, W.; Yan, H.; Chai, X. J.; Wang, S. H.; Dong, X. L.; Ren, L. X.; Chen, C. L.; Jin, K. X.^*

来源：Applied Physics Letters, 2017, 110(19): 192411.

DOI：10.1063/1.4983464

• PHASE-SEPARATION
• THIN-FILMS
• TRANSPORT-PROPERTIES
• TRANSITION
• PHYSICS
• OXIDES
• FIELD

Persistent magnetoresistance effects in the phase-separated Pr-0.65(Ca0.25Sr0.75) 0.35MnO3/SrTiO3 and Pr-0.65(Ca0.25Sr0.75)(0.35)MnO3/0.7PbMg(1/3)Nb(2/3)O(3)-0.3PbTiO(3) heterostructures under a low magnetic field are investigated. It is observed that the persistent magnetoresistance effects decrease with increasing temperatures and the values for the heterostructures on 0.7Pb(Mg1/3Nb2/3) O3-0.3PbTiO(3) and SrTiO3 substrates are about 86.6% and 33.2% at 40 K, respectively. More interestingly, the applied electric field on the 0.7PbMg(1/3)Nb(2/3)O(3)-0.3PbTiO3 substrate can suppress the persistent magnetoresistance effect, indicating that different energy landscapes can be dramatically modulated by the piezo-strain. These results are discussed in terms of the strain-induced competition in the ferromagnetic state and the charge-ordering phase by the energy scenario, which provide a promising approach for designing devices of electric-magnetic memories in all-oxide heterostructures. Published by AIP Publishing.

• 出版日期2017-5-8
• 单位西北工业大学