Direct-current effects on magnetization reversal properties of submicron-size Permalloy patterns for radio-frequency devices

Journal Article · Mon Dec 07 00:00:00 EST 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3271777· OSTI ID:21294501

Hanqiao, Zhang; Pingshan, Wang ^[1]; Hoffmann, Axel ^[2]; Divan, Ralu ^[3]

---

1. Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina 29631 (United States)
2. Material Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Ferromagnetic resonance (FMR) spectroscopy is used to measure direct-current (dc) effects on the magnetization reversal properties of submicron-sized lateral patterned magnetic material. The observed FMR frequency-field relationship shows that for both 240 and 550 nm wide Permalloy (Py) nanowires the coercivity is reduced by {approx}33% when a 50 mA dc passes through the transmission line where the nanowires are incorporated. The temperature dependence of the coercivity has a {radical}(T) relationship which suggests the coherent rotation mode tendency in such 100 nm thick Py nanowires.

• OSTI ID: 21294501
• Journal Information: Applied Physics Letters, Vol. 95, Issue 23; Other Information: DOI: 10.1063/1.3271777; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
COERCIVE FORCE
DIRECT CURRENT
FERROMAGNETIC RESONANCE
MAGNETIC MATERIALS
MAGNETIZATION
PERMALLOY
QUANTUM WIRES
RADIOWAVE RADIATION
SPECTROSCOPY
TEMPERATURE DEPENDENCE
THIN FILMS