Organic materials have proven to be important for electronics by virtue of being cheap, environmentally friendly, flexible, easy to process and offering virtually unlimited variations of functionality. They are also promising for spintronics, a branch of electronics that employs spin degrees of freedom in electronic devices. We have shown that a new layer of functionality, called ferroelectricity, can be added to the repertoire of spintronic devices based on organic materials.
We have developed a single-step method to produce highly ordered and single-phase RE-TM nanoparticles such as YCo5 and Y2Co17, by employing a cluster-deposition system without high-temperature thermal annealing. This research provides the basis for significant development of RE-TM nanoparticles for important new applications.
A partnership between the University of Nebraska MRSEC, a Doane College professor and student, and two Nebraska high school teachers is developing an inexpensive scanning tunneling microscope (STM) capable of atomic resolution at room temperature and atmospheric pressures. To achieve low cost, thus making the instrument affordable by many high-schools and most colleges, the team has avoided using exotic materials and high-end computers and electronics and has used open-source free software.
MRSEC researchers at the University of Nebraska-Lincoln and their colleagues at the LNM Institute of Information Technology, Jaipur, India have combined state-of-the-art computational approaches with experiments to visualize quantum states. By comparing theory with experiment the researchers were able to test important quantum-mechanical concepts and understand how macroscopic properties emerge from quantum mechanics.
Researchers at the University of Nebraska MRSEC explore the use of spin waves in magnetic nanoparticles as a robust system for quantum computing. The researchers calculated the degree of entanglement as a function of the external magnetic field and the size of the nanosphere and showed that the entanglement decreases with the field. This result implies that spin waves in magnetic nanoparticles can be used to realize quantum entanglement.
Researchers at the University of Nebraska MRSEC in collaboration with their colleagues from the Naval Research Laboratory have reported optical determination of free-charge carrier mobility, sheet density, and resistivity parameters in epitaxial graphene at room temperature.
Ferroelectric materials have been the subject of intense development for use in nonvolatile memories, where bits of information are stored as polarization dipoles oriented up and down. The most serious problem related to a traditional charge-based approach to such ferroelectric memories is leakage currents that lead to a large power consumption and progressive loss of stored information.
Nebraska MRSEC exploits the huge potential of molecular self-assembly on surfaces to form ordered 2D organics, as model systems for the study of the fundamental relationship between their structure and their physical properties. To this end, organic nano-architectures are engineered like Legos, molecule-by-molecule, to achieve desired functionality.
Understanding local magnetic properties of dilute magnetic impurities in nonmagnetic hosts is of both fundamental and practical importance. Atomic metal clusters provide a unique medium for exploring local magnetism, as the cluster size, the number of valence electrons, and the local structures can be readily controlled and varied. In particular, a single magnetic atom trapped in a metallic cage (i.e., core/shell cluster) can be an ideal molecular model for dilute magnetic alloys. We have found the golden-cage Au16- cluster, which has a sufficiently large internal volume to encapsulate a foreign atom.
Electric control of magnetism provides an almost powerless approach to manipulate magnetic states for data storage and processing purposes. Electric control of exchange bias, a specific control of the magnetic hysteresis of a ferromagnetic thin film, will play an important role in a large class of future spintronic devices. We work on its realization with the help of the magnetoelectric antiferromagnet Cr2O3. The latter replaces today's passive pinning layers in exchange bias heterostructures by an active magnetoelectric material. Recently, a very unusual specific surface magnetic order which enables magnetoelectric control of a net magnetic moment of the Cr2O3 (111) surface has been predicted by our first principle calculations and experimental evidence has been found by magnetometry and spin polarized photoemission.
Organic materials have proven to be important for electronics by virtue of being cheap, environmentally friendly, flexible, easy to process and offering virtually unlimited variations of functionality. They are also promising for spintronics, a branch of electronics that employs spin degrees of freedom in electronic devices. We have shown that a new layer of functionality, called ferroelectricity, can be added to the repertoire of spintronic devices based on organic materials.
We have developed a single-step method to produce highly ordered and single-phase RE-TM nanoparticles such as YCo5 and Y2Co17, by employing a cluster-deposition system without high-temperature thermal annealing. This research provides the basis for significant development of RE-TM nanoparticles for important new applications.
A partnership between the University of Nebraska MRSEC, a Doane College professor and student, and two Nebraska high school teachers is developing an inexpensive scanning tunneling microscope (STM) capable of atomic resolution at room temperature and atmospheric pressures. To achieve low cost, thus making the instrument affordable by many high-schools and most colleges, the team has avoided using exotic materials and high-end computers and electronics and has used open-source free software.
MRSEC researchers at the University of Nebraska-Lincoln and their colleagues at the LNM Institute of Information Technology, Jaipur, India have combined state-of-the-art computational approaches with experiments to visualize quantum states. By comparing theory with experiment the researchers were able to test important quantum-mechanical concepts and understand how macroscopic properties emerge from quantum mechanics.
Researchers at the University of Nebraska MRSEC explore the use of spin waves in magnetic nanoparticles as a robust system for quantum computing. The researchers calculated the degree of entanglement as a function of the external magnetic field and the size of the nanosphere and showed that the entanglement decreases with the field. This result implies that spin waves in magnetic nanoparticles can be used to realize quantum entanglement.
Researchers at the University of Nebraska MRSEC in collaboration with their colleagues from the Naval Research Laboratory have reported optical determination of free-charge carrier mobility, sheet density, and resistivity parameters in epitaxial graphene at room temperature.
Ferroelectric materials have been the subject of intense development for use in nonvolatile memories, where bits of information are stored as polarization dipoles oriented up and down. The most serious problem related to a traditional charge-based approach to such ferroelectric memories is leakage currents that lead to a large power consumption and progressive loss of stored information.
Nebraska MRSEC exploits the huge potential of molecular self-assembly on surfaces to form ordered 2D organics, as model systems for the study of the fundamental relationship between their structure and their physical properties. To this end, organic nano-architectures are engineered like Legos, molecule-by-molecule, to achieve desired functionality.
