SKM 2021 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 11: Focus Session: Functional Metal Oxides for Novel Applications and Devices
HL 11.6: Vortrag
Dienstag, 28. September 2021, 16:00–16:15, H4
Observation and control of improper ferroelectric nano-domains in Gd2(MoO4)3 — •Ivan Ushakov1, Theodor Holstad1, Didier Perrodin2, Edith Bourret2, and Dennis Meier1 — 1NTNU Norwegian University of Science and Technology, Norway — 2Materials Science Division, Lawrence Berkeley National Laboratory, USA
Gd2(MoO4)3 is a classical example of an improper ferroelectric material and has been extensively studied with respect to its ferroic properties and ferroelectric/ferroelastic domains. Here, we revisit the ferroelectric domain structure and expand previous optical investigations to the nanoscale. By using Piezoresponse Force Microscopy (PFM), we resolve the established pattern of ferroelectric and anti-phase domains in Gd2(MoO4)3. In addition, we discover stripe-like nano-domains with a periodicity of about 50 nm. The response of the ordered nano-domains to locally applied electric fields, pressure, and temperature is presented. Our findings provide new insight into the physics of Gd2(MoO4)3 at the level of the domains and introduce novel opportunities for property engineering at the local scale.