Highlights
Mar 13, 2012
University of Nebraska - Lincoln
Electric Field Control of Magnetization
Abhijit Mardana, Stephen Ducharme, and Shireen Adenwalla (Nebraska MRSEC)
To change the magnetization of a ferromagnet usually requires a magnetic field. So, for example, if we put a compass needle into the high field of an MRI machine, we can no longer trust it to swivel to the North. Similarly, the magnetic stripes on credit cards and key cards can be destroyed in high magnetic fields. Electric fields don’t have the same effect on magnetic materials, which is just as well for everyday applications.
Mar 13, 2012
University of Nebraska - Lincoln
Organic Ferroelectric Photovoltaics
Jinsong Huang, Stephen Ducharme, and Alexei Gruverman (Nebraska MRSEC)
Photovoltaics is a method of converting solar radiation into electricity. Some semiconducting materials exhibit a property known as the photoelectric effect that causes them to absorb light and release electrons. In addition to the semiconductors, ferroelectric materials have been employed to create ferroelectric-photovoltaic devices. In these devices, a ferroelectric thin film is used as a light absorbing layer and the electric field created by ferroelectric polarization is the driving force for the photocurrent.
Mar 13, 2012
University of Nebraska - Lincoln
Nebraska MRSEC Professor/Student Pairs Program
Jeffrey Shield (Nebraska MRSEC)
The Nebraska MRSEC Professor/Student Pairs Program brings in professor/student pairs from non-research intensive four-year institutions to conduct research with Nebraska MRSEC scientists. The goal is to provide a research experience which benefits both the participants and the MRSEC projects. For the professor, this program provides an opportunity to conduct new research, access to facilities typically unavailable at their home institution, and make strong and lasting connections with MRSEC researchers. For the student, this program provides an opportunity to conduct world-class research
Mar 13, 2012
University of Nebraska - Lincoln
Organic Molecular Layers for Efficient Charge Injection
Peter A. Dowben, Axel Enders (Nebraska MRSEC); Luis Rosa (University of Puerto Rico - Humacao); Julian Velev (University of Puerto Rico - Río Piedras)
High conductivity and efficient charge injection into organic layers could lead to the design of more efficient organic solar cells and molecular electronics, especially light emitting diodes. Most organic materials are however insulators and only few exhibit high conducting properties. Nebraska MRSEC researchers in collaboration with their colleagues at University of Puerto Rico have discovered that zwitterion molecules of the p-benzoquinonemonoimine type are different from being a standard insulator.
Mar 12, 2012
University of Nebraska - Lincoln
Enhanced Ferroelectric Stability by Interface Engineering
A. Gruverman and E. Y. Tsymbal (Nebraska MRSEC); C.-B. Eom (University of Wisconsin); X. Pan (University of Michigan)
Ferroelectric materials are characterized by a spontaneous polarization that can be switched by external electric field. This property is important for various technological applications such ferroelectric random access memories. However, when ferroelectric film thickness is reduced down to a nanoscale the ferroelectric polarization may become unstable due to strong depolarization fields and interface effects.
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