A proposed method for electronic feedback compensation of damping in ferromagnetic resonance

Journal Article · 10 July 2017 · Journal of Magnetism and Magnetic Materials

DOI: https://doi.org/10.1016/j.jmmm.2017.07.030 · OSTI ID:1379174

Zohar, S. ^[1]; Sterbinsky, G. E. ^[2]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
2. Argonne National Lab. (ANL), Lemont, IL (United States)

Here, we propose an experimental technique for extending feedback compensation of dissipative radiation used in nuclear magnetic resonance (NMR) to encompass ferromagnetic resonance (FMR). This method uses a balanced microwave power detector whose output is phase shifted π/2, amplified, and fed back to drive precession. Using classical control theory, we predict an electronically controllable narrowing of field swept FMR line-widths. This technique is predicted to compensate other sources of spin dissipation in addition to radiative loss.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: National Institutes of Health (NIH); USDOE
• Grant/Contract Number: AC02-06CH11357; AC02-76SF00515
• OSTI ID: 1379174
• Alternate ID(s): OSTI ID: 1410452
• Journal Information: Journal of Magnetism and Magnetic Materials, Vol. 443, Issue C; ISSN 0304-8853
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English