Ferroelectronics Lab

Understanding and utilizing non-volatile properties of materials

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Peter receives a WCED Summer Research and Internship Grant

April 4, 2017 By John Heron

Congratulations to Peter on receiving a 2500$ WCEE Summer Research and Internship Grant to spend time with our collaborators in Switzerland this summer doing second harmonic generation on magnetic and multiferroic oxides. This funding is provided by the Weiser Center for Emerging Democracies (WCED).

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Peter receives an Honorable mention from the NSF GSRF.

March 17, 2017 By John Heron


Congratulations to Peter for receiving an Honorable mention for his NSF Graduate Research Proposal on High Entropy Oxides. Applicants receiving Honorable Mention are provided enhanced access to cyberinfrastructure resources, including supercomputing time, in support of research toward completion of the graduate program of study.

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Betsy joins the lab!

March 5, 2017 By John Heron


Betsy is a senior studying Materials Science Engineering and minoring in Multidisciplinary Design. She is a project lead on The Initiative, a team which designs heated bassinets for underweight infants in Ethiopia. Currently she assists with the characterization of entropy stabilized oxides and has previously worked on a capillary angiogenesis project in the CSET Laboratory at the University of Michigan.
When not logging impressive study marathons in the basement of the library, Betsy enjoys skiing, backpacking, and attempting to delicious food on a college budget.

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New publication! – “Spin-Hall Torques Generated by Rare-Earth (Lanthanide) Thin Films”

February 14, 2017 By John Heron

New publication! – Neal Reynolds, Priyamvada Jadaun, John T. Heron, Colin L. Jermain, Jonathan Gibbons, Robyn Collette, R. A. Buhrman, Darrell G. Schlom and D. C. Ralph, “Spin-Hall Torques Generated by Rare-Earth (Lanthanide) Thin Films” Phys. Rev. B. 95, 064412 (2017).

Abstract:
We report an initial experimental survey of spin Hall torques generated by the rare-earth metals Gd, Dy, Ho, and Lu, along with comparisons to first-principles calculations of their spin Hall conductivities. Using spin torque ferromagnetic resonance (ST-FMR) measurements and dc-biased ST-FMR, we estimate lower bounds for the spin Hall torque ratio, ξSH, of ≈0.04 for Gd, ≈0.05 for Dy, ≈0.14 for Ho, and ≈0.014 for Lu. The variations among these elements are qualitatively consistent with results from first principles [density-functional theory (DFT) in the local density approximation with a Hubbard-U correction]. The DFT calculations indicate that the spin Hall conductivity is enhanced by the presence of the partially filled f orbitals in Dy and Ho, which suggests a strategy to further strengthen the contribution of the f orbitals to the spin Hall effect by shifting the electron chemical potential.

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Nguyen presents a poster at the VEF fellows and scholars conference.

February 9, 2017 By John Heron

Congratulations to Nguyen, who presented her poster “alpha-Cr2O3 Thin Films Grown by Pulsed Laser Deposition” at the VEF fellows and scholars conference in Phoenix AZ.

Abstract:
Magnetoelectric materials have been of interest because of their potential for low-power spintronic devices using electric field switching. One possible candidate is antiferromagnetic α-Cr2O3, which possesses an uncompensated surface magnetization. Recent significant results of magnetoelectric switching are mostly done in bulk single crystal α-Cr2O3. In this work, we study the pulsed laser deposition of α-Cr2O3 on Al2O3 (0001) substrate in order to find the appropriate conditions for a smooth and high quality thin film for technological adoption. The heterostructure of Pt/α-Cr2O3/metal is deposited in order to study magnetic and magnetoelectric properties of α-Cr2O3.

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News

  • New Publication! “Geometric defects induced by strain relaxation in thin film oxide superlattices.” November 10, 2022
  • New Publication! “Nanophotonic control of thermal emission under extreme temperatures in air” September 29, 2022
  • New Publication! “Germanium dioxide: A new rutile substrate for epitaxial film growth” September 1, 2022

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About

Our work is multidisciplinary. We employ concepts and tools from the fields of materials science, chemistry, physics and electrical engineering to develop new methods to investigate and engineer … Read More

News

New Publication! “Geometric defects induced by strain relaxation in thin film oxide superlattices.”

November 10, 2022 By Matt Webb

New Publication! “Nanophotonic control of thermal emission under extreme temperatures in air”

September 29, 2022 By Matt Webb

Contact

Ferroelectronics Lab
Address: 2030 H.H. Dow

T: (734) 763-6914
E: jtheron@umich.edu
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