Improving magnetic field detection limits of spin valve sensors using magnetic flux guide concentrators

IEEE Transactions on Magnetics

Volumn 43, Issue 6, 2007, Pages 2376-2378

  Guedes, A ^a,b   Almeida, J M ^a,b   Cardoso, S ^a,b   Ferreira, R ^a,b   Freitas, P P ^a,b  

^a INETI   (Portugal)

^b INSTITUTO SUPERIOR TÉCNICO   (Portugal)

Author keywords

1 f noise; Flux concentrator; Low field detection; Magnetoresistive sensors; Spin valve sensitivity

Indexed keywords

GAIN MEASUREMENT; MAGNETIC FIELD EFFECTS; MAGNETIC FLUX; SIGNAL NOISE MEASUREMENT; THERMAL NOISE;

FLUX CONCENTRATOR; LOW FIELD DETECTION; MAGNETIC FLUX GUIDE CONCENTRATORS; MAGNETORESISTIVE SENSORS; SPIN VALVE SENSITIVITY;

MAGNETIC DEVICES;

EID: 34249059557     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2007.893119     Document Type: Article

References (10)

1. H. A. Ferreira, F. A. Cardoso, R. Ferreira, S. Cardoso, and P. P. Freitas, "Magnetoresistive DNA chips based on ac field focusing of magnetic labels," J. Appl. Phys., vol. 99, 2006, 08P105.
2. P. Drljacca, F. Vincent, P. Besse, and R. Popovic, "Design of planar magnetic concentrator for high sensitivity Hall devices," Sens. Actuators A, vol. 97-98, pp. 10-14, 2002.
3. N. Smith, F. Jeffers, and J. Freeman, "A high-sensitivity magnetoresistive magnetometer," J. Appl. Phys., vol. 69, pp. 5082-5084, 1991.
4. C. Fermon, M. Pannetier-Lecoeur, N. Biziere, and B. Cousin, "Optimizing GMR sensor for low and high frequencies applications," Sens. Actuators A, vol. 129, pp. 203-206, 2006.
5. J. Jury, K. Klaassen, J. van Peppen, and S. Wang, "Measurement and analysis of noise sources in giant magnetoresistive sensors up to 6 GHz," IEEE Trans. Magn., vol. 38, no. 5, pt. 2, pp. 3545-3555, Sep. 2002.
6. V. Gehanno, P. P. Freitas, A. Veloso, J. Ferreira, B. Almeida, J. B. Sousa, A. Kling, J. C. Soares, and M. F. da Silva, "Ion beam deposition of Mn-Ir spin valves," IEEE Trans. Magn, vol. 35, no. 5, pt. 3, pp. 4361-4367, Sep. 1999.
7. FEMM 4.0. [Online]. Available: http://femm.foster-miller.net/
8. R. Ferreira, P. P. Freitas, J. Langer, B. Ocker, and W. Maass, "Tuning of MgO barrier magnetic tunnel junctions bias current for pico-tesla magnetic field detection," J. Appl. Phys, vol. 99, 2006, 08K706.
9. J. M. Almeida, R. Ferreira, P. P. Freitas, J. Langer, B. Ocker, and W. Maass, "1/f noise in linearized low resistance MgO magnetic tunnel junctions," J. Appl. Phys., vol. 99, 2006, 08B314.
10. N. Stutzke, S. Russek, D. Pappas, and M. Tondra, "Low-frequency noise measurements on commercial magnetoresistive magnetic field sensors," J. Appl. Phys., vol. 97, 2005, 10Q107.