Simulations and experiments toward high-data-transfer-rate readers composed of a spin-torque oscillator

IEEE Transactions on Magnetics

Volumn 48, Issue 5 PART 1, 2012, Pages 1758-1764

  Sato, Rie ^a   Kudo, Kiwamu ^a   Nagasawa, Tazumi ^a   Suto, Hirofumi ^a   Mizushima, Koichi ^a  

^a TOSHIBA CORPORATION   (Japan)

Author keywords

Frequency modulation; read head; spin torque oscillator; thermal noise

Indexed keywords

DATA TRANSFER; FREQUENCY MODULATION; SIGNAL TO NOISE RATIO; SPIN FLUCTUATIONS; THERMAL NOISE;

COMMUNICATION TECHNOLOGIES; HIGH DATA TRANSFER RATES; MAGNETIZATION FLUCTUATIONS; MICROMAGNETIC SIMULATIONS; OSCILLATION FREQUENCY; READ HEADS; SPIN-TORQUE OSCILLATORS; THERMAL FLUCTUATIONS;

DATA TRANSFER RATES;

EID: 84860480154     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2011.2173560     Document Type: Article

References (23)

1. K. Mizushima, K. Kudo, T. Nagasawa, and R. Sato, "Signal-to-noise ratios in high-signal-transfer-rate read heads composed of spin-torque oscillators," J. Appl. Phys., vol. 107, p. 063904, Mar. 2010.
2. K. Kudo, T. Nagasawa, K. Mizushima, H. Suto, and R. Sato, "Numerical simulation on temporal response of spin-torque oscillator to magnetic pulses," Appl. Phys. Express, vol. 3, p. 043002, Apr. 2010.
3. P. M. Braganga, B. A. Gurney, B. A.Wilson, J. A. Katine, S. Maat, and J. R. Childress, "Nanoscale magnetic field detection using a spin-torque oscillator," Nanotechnology, vol. 21, p. 235202, May 2010.
4. H. Suto, T. Nagasawa, K. Kudo, K. Mizushima, and R. Sato, "Realtime measurement of temporal resonse of a sin-torque oscillator to magnetic pulses," Appl. Phys. Express, vol. 4, p. 013003, 2011.
5. T. Nagasawa, H. Suto, K. Kudo, K. Mizushima, and R. Sato, "Frequency transition of spin-torque oscillator under the magnetic-field pulse in nanosecond range," J. Appl. Phys., vol. 109, p. 07C907, Mar. 2011.
6. A. N. Slavin and V. Tiberkevich, "Nonlinear auto-oscillator theory of microwave generation by spin-polarized current," IEEE Trans. Magn., vol. 45, pp. 1875-1918, Apr. 2009.
7. A. Ham and A. Hajimiri, "Virtual damping and Einstein relation in oscillators," IEEE J. Solid-State Circuits, vol. 38, pp. 407-418, Mar. 2003.
8. V. Tiberkevich and A. Slavin, "Temperature dependence of nonlinear autooscillator linewidth: Application to spin-torque nano-oscillators," Phys. Rev. B, vol. 78, p. 092401, Sep. 2008.
9. C. Boone, J. A. Katine, J. R. Childress, J. Zhu, X. Cheng, and I. N. Krivorotov, "Experimental test of an analytical theory of spin-torqueoscillator dynamics," Phys. Rev. B, vol. 79, p. 140404(R), Apr. 2009.
10. M. Quinsat, D. Gusakova, J. F. Sierra, J. P. Michel, D. Haussameddine, B. Delaet, M.-C. Cyrille, U. Ebels, B. Dieny, L. D. Buda-Prejbeanu, J. A. Katine, D. Mauri, A. Zeltser, M. Prigent, J.-C. Nallatamby, and R. Sommet, "Amplitude and phase noise of magnetic tunnel junction oscillators," Appl. Phys. Lett., vol. 97, p. 182507, Nov. 2010.
11. K. Kudo, T. Nagasawa, R. Sato, and K. Mizushima, "Amplitude-phase coupling in a spin-torque nano-oscillator," J. Appl. Phys., vol. 105, p. 07D105, Feb. 2009.
12. K. Mizushima, T. Nagasawa, K. Kudo, Y. Saito, and R. Sato, "Decrease of nonlineality and linewidth narrowing in spin-transfer oscillators under the external field applied near the hard axis," Appl. Phys. Lett., vol. 94, p. 152501, Apr. 2009.
13. K. Kudo, T. Nagasawa, R. Sato, and K. Mizushima, "Measurement of nonlinear frequency shift coefficient in spin-torque oscillators based on MgO tunnel junctions," Appl. Phys. Lett., vol. 95, p. 022507, Jul. 2009.
14. K. V. Thadani, G. Finocchio, Z.-P. Li, O. Ozatay, J. C. Sankey, I. N. Krivorotov, Y.-T. Cui, R. A. Buhrman, and D. C. Ralph, "Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle," Phys. Rev. B, vol. 78, p. 024409, Jul. 2008.
15. J.-V. Kim, "Stochastic theory of spin-transfer oscillator linewidths," Phys. Rev. B, vol. 73, p. 174412, May 2006.
16. K. Mizushima, K. Kudo, and R. Sato, "Phase and amplitude noise spectra in spin-transfer nano-oscillators," J. Appl. Phys., vol. 101, p. 113903, Jun. 2007.
17. R. Sato, Y. Saito, and K. Mizushima, "Current-dependent linewidth of a spin-transfer nano-oscillator," J. Magn. Magn. Mater., vol. 321, pp. 990-995, Apr. 2009.
18. A. N. Slavin and P. Kabos, "Approximate theory of microwave generation in a current-driven magnetic nanocontact magnetized in an arbitrary direction," IEEE Trans. Magn., vol. 41, pp. 1264-1273, Jun. 2005.
19. W. F. Brown, Jr, "Thermal fluctuations of a single-domain particle," Phys. Rev., vol. 130, pp. 1677-1686, Jun. 1963.
20. J. C. Slonczewski, "Current-driven excitation of magnetic multilayers," J. Magn. Magn. Mater., vol. 159, pp. L1-L7, Jun. 1996.
21. C. J. García-Cervera and E. Weinan, "Improved Gauss-Seidel projection method for micromagnetics simulations," IEEE Trans. Magn., vol. 39, pp. 1766-1770, May 2003.
22. N. Hayashi, K. Saito, and Y. Nakatani, "Calculation of demagnetizing field distribution based on fast Fourier transform of convolution," Jpn. J. Appl. Phys., vol. 35, pp. 6065-6073, Dec. 1996.
23. A. Pikovsky, M. Rosenblum, and J. Kurths, Synchronization: A Universal Concept in Nonlinear Dynamics. Cambridge, U.K.: Cambridge University Press, 2003, pp. 362-370.