Measurement and analysis of noise sources in giant magnetoresistive sensors up to 6 GHz

• Published in: IEEE transactions on magnetics Vol. 38; no. 5; pp. 3545 - 3555
• Main Authors: Jury, J.C., Klaassen, K.B., van Peppen, J.C.L., Wang, S.X.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2002; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Electric resistance; Electrical noise; Electrical resistance measurement; Electronics; Exact sciences and technology; Fluctuation; Giant magnetoresistance; Hard disks; Magnetic analysis; Magnetic device characterization, design, and modeling; Magnetic devices; Magnetic noise; Magnetic resonance; Magnetic sensors; Magnetism; Magnetization; Mathematical models; Noise; Noise measurement; Nonuniform; Saturation magnetization; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Sensors; Thermal resistance; Magnetoresistive device; does not snow such a variation. Index Terms-Giant magnetoresistive sensor noise; thermal-electric model; magnetic thermal fluctuations; Theoretical study; Thermal noise; Giant magnetoresistance; Magnetoresistance; nonlinear resistance thermal noise; Magnetic device; linewidth; Magnetic properties

Describes the electrical and magnetic noise sources prevalent in giant magnetoresistive (GMR) sensors. At lower frequencies (<1 MHz), 1/f noise is generally dominant. Electrical (Nyquist-Johnson) and magnetic thermal fluctuation noise are dominant above 1 MHz. Because the GMR sensor resistance is...