The Cornell Chronicle did a short piece on our recent DOE award for scanned-probe magneto-thermal microscopy of skyrmions: “DOE funds to help researchers reveal mysteries of magnetic materials.”
We have several new papers out for both diamond spins and magneto-thermal microscopy:
- “Imaging uncompensated moments and exchange-biased emergent ferromagnetism in FeRh thin films” by Isaiah Gray, Gregory M. Stiehl, John T. Heron, Antonio B. Mei, Darrell G. Schlom, Ramamoorthy Ramesh, Daniel C. Ralph, and Gregory D. Fuchs is now posted on the arXiv. In this work we use magneto-thermal microscopy to study unusual exchange bias and ferromagnet-antiferromagnet coupling in FeRh.
- “Local Photothermal Control of Phase Transitions for On-demand Room-temperature Rewritable Magnetic Patterning” by Antonio B. Mei, Isaiah Gray, Yongjian Tang, Jurgen Schubert, Don Werder, Jason Bartell, Daniel C. Ralph, Gregory D. Fuchs, and Darrell G. Schlom was posted on the arXiv at the same time. In this we we demonstrate patterning ferromagnetism in FeRh at room temperature.
- “Engineering electron-phonon coupling of quantum defects to a semi-confocal acoustic resonator” by Huiyao Chen, Noah F. Opondo, Boyang Jiang, Evan R. MacQuarrie, Raphaël S. Daveau, Sunil A. Bhave, and Gregory D. Fuchs is on the arXiv. In this work we demonstrate a wavelength-scale bulk acoustic resonator in diamond that has enhanced spin-phonon coupling and optical collection.
- “Dual-frequency spin resonance spectroscopy of diamond nitrogen-vacancy centers in zero magnetic field” by A. K. Dmitriev†, H. Y. Chen†, G. D. Fuchs, A. K. Vershovskii is in press at Phys. Rev. A. In this work we model zero-field phenomena based on Landau-Zener-Stückelberg tunneling of diamond NV center ensembles.
Here is a link to the Cornell Chronicle article on our recent DOE quantum information science award: Cornell receives nearly $3.5M in federal push for quantum information research
Contratulations to Nick Jungwirth for sucessfully defending his Ph.D. thesis, “An Exploration of Defect-based Single Photon Sources: Zinc Oxide and Hexagonal Boron Nitride.”
Our paper, “Spin Seebeck imaging of spin-torque switching in antiferromagnetic Pt/NiO/Pt heterostructures,” by Isaiah Gray, Takahiro Moriyama, Nikhil Sivadas, Ryan Need, Brian J. Kirby, David H. Low, Gregory M. Stiehl, John T. Heron, Daniel C. Ralph, Katja C. Nowack,Teruo Ono, and Gregory D. Fuchs is now posted to the arXiv.
Our paper “Engineering Dzyaloshinskii-Moriya interaction in B20 thin film chiral magnets” by Emrah Turgut, Hanjong Paik, Kayla Nguyen, David A. Muller, Darrell G. Schlom, Gregory D. Fuchs is now out at Physical Review Materials.
Hearty congratulations to Professor Emrah Turgut, who has left our group to start his own at Oklahoma State University in Physics
Congratulations to Dr. Jason Bartell for defending his thesis, “Time-Resolved Magnetic Microscopy Using Near- and Far-Field Picosecond Heating.”
Our paper, “Orbital state manipulation of a diamond nitrogen-vacancy center using a mechanical resonator,” by H. Y. Chen, E. R. MacQuarrie, and G. D. Fuchs is out in Physical Review Letters with an editor’s suggestion.
This year there will be 6 talks from the Fuchs Group – come see us!
- A22.00010 Magneto-thermal imaging of exchange bias in Pt/FeRh bilayers (Isaiah Gray)
- E22.00010 Engineering the Dzyaloshinskii-Moriya interaction in MnxFe1-xGe thin films (Emrah Turgut)
- E22.00014 Using scanning plasmonic heating for nanoscale imaging of magnetization (Jason Bartell)
- F27.00004 Strong Mechanical Modulation of Nitrogen-Vacancy Center Excited States (Huiyao Chen)
- F56.00003 Intrinsic conductivity mechanisms of radical polymer films with conjugated and non-conjugated backbones (Albert Park)
- R11.00008 Optical Absorption and Emission Mechanisms of Single Defects in Hexagonal Boron Nitride (Nick Jungwirth)