AFM Resources

Back

Exchange-Interaction-Like Behavior in Ferroelectric Bilayers

AFM probes used in the publication

Tap300Al-G
Best Seller

Tap300Al-G

Tapping Mode AFM Probe with Aluminum Reflective Coating
Coating: Reflective Aluminum
Tip Shape: Rotated
AFM Cantilever:
  • F
    300 kHz
  • C
    40 N/m
  • L
    125 µm

Abstract

Interlayer coupling in materials, such as exchange interactions at the interface between an antiferromagnet and a ferromagnet, can produce exotic phenomena not present in the parent materials. While such interfacial coupling in magnetic systems is widely studied, there is considerably less work on analogous electric counterparts (i.e., akin to electric “exchange-bias-like” or “exchange-spring-like” interactions between two polar materials) despite the likelihood that such effects can also engender new features associated with anisotropic electric dipole alignment. Here, electric analogs of such exchange interactions are reported, and their physical origins are explained for bilayers of in-plane polarized Pb1−xSrxTiO3 ferroelectrics. Variation of the strontium content and thickness of the layers provides for deterministic control over the switching properties of the bilayer system resulting in phenomena analogous to an exchange-spring interaction and, leveraging added control of these interactions with an electric field, the ability to realize multistate-memory function. Such observations not only hold technological promise for ferroelectrics and multiferroics but also extend the similarities between ferromagnetic and ferroelectric materials to include the manifestation of exchange-interaction-like phenomena.
Loading