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Low-voltage magnetoelectric coupling in membrane heterostructures

Journal Article · · Science Advances
 [1];  [2];  [3];  [4];  [2];  [4];  [2];  [4];  [3];  [2];  [2]
  1. University of Wisconsin, Madison, WI (United States); Univ. of Wisconsin, Madison, WI (United States)
  2. University of Wisconsin, Madison, WI (United States)
  3. Pohang University of Science and Technology, Pohang, (Korea, Republic of)
  4. Pennsylvania State University, University Park, PA (United States)

Strain-mediated magnetoelectric (ME) coupling in ferroelectric (FE)/ferromagnetic (FM) heterostructures offers a unique opportunity for both fundamental scientific research and low-power multifunctional devices. Relaxor-FEs, such as (1-x)Pb(Mg1/3Nb2/3)O3-(x)PbTiO3 (PMN-xPT), are ideal FE layer candidates because of their giant piezoelectricity. However, thin films of PMN-PT suffer from substrate clamping, which substantially reduces piezoelectric in-plane strains. Here, we demonstrate low-voltage ME coupling in an all-thin-film heterostructure that uses the anisotropic strains induced by the (011) orientation of PMN-PT. We completely remove PMN-PT films from their substrate and couple with FM Ni overlayers to create membrane PMN-PT/Ni heterostructures showing 90° Ni magnetization rotation with 3 V PMN-PT bias, much less than the bulk PMN-PT ~100-V requirement. Scanning transmission electron microscopy and phase-field simulations clarify the membrane response. These results provide a crucial step toward understanding the microstructural behavior of PMN-PT thin films for use in piezo-driven ME heterostructures.

Research Organization:
University of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Army Research Office (ARO); Vannevar Bush Faculty Fellowship; Gordon and Betty Moore Foundation; National Research Foundation of Korea (NRF)
Grant/Contract Number:
FG02-06ER46327
OSTI ID:
1904646
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 46 Vol. 7; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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