Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2011-07-26
2011-07-26
Nguyen, Ha Tran T (Department: 2858)
Electricity: measuring and testing
Magnetic
Displacement
C324S260000, C324S076560
Reexamination Certificate
active
07986140
ABSTRACT:
Systems and methods for RF magnetic-field vector detection based on spin rectification effects are described. In one embodiment, a method comprises sweeping a quasi-static external applied magnetic field at a h-vector detector, measuring voltages across terminals of the h-vector detector when the detector receives a microwave, varying the angle between the external applied static magnetic field and the RF current, determining an angular dependence of the measured voltages, and calculating a magnetic-field vector (h-vector) component of the microwave. In another embodiment, a method comprises providing an array of h-vector detectors, each element of the array being positioned at a different angle with respect to each other, subjecting the array to an external swept quasi-static magnetic field, measuring voltages across terminals of each element of the array when the array receives a microwave, associating each measured voltage with a respective angle, and calculating at least one h-vector component of the microwave.
REFERENCES:
patent: 7203618 (2007-04-01), Hammerschmidt et al.
patent: 7408344 (2008-08-01), Tokuhara
Azevedo et al., “dc effect in ferromagnetic resonance: evidence of the spin-pumping effect?”J. Appl. Phys., 97:10C715, 2005.
Bai et al., “The rf magnetic-field vector detector based on the spin rectification effect,”Applied Physics Letters, 92:32504, 2008.
Berger, “Emission of spin waves by a magnetic multilayer traversed by a current,”Phys. Rev. B., 54:9353, 1996.
Berger, “Generation of dc voltages by a magnetic multilayer undergoing ferromagnetic resonance,”Phys. Rev. B., 59:11465, 1999.
Brataas et al., “Spin battery operated by ferromagnetic resonance,”Phys. Rev. B., 66:060404 (R), 2002.
Camley and Mills, “Theory of microwave propagation in dielectric/magnetic film multilayer structures,”J. Appl. Phys., 82:3058, 1997.
Costache et al., “Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet,”Phys. Rev. Lett., 97:216603, 2006.
Costache et al., “Large cone angle magnetization precession of an individual nanopatterned ferromagnet with dc electrical detection,”Appl. Phys. Lett., 89:232115, 2006.
Egan and Juretschke, “DC detection of ferromagnetic resonance in thin nickel films,”J. Appl. Phys., 34:1477, 1963.
Foner, “Hall effect in permalloys,”Phys. Rev., 99:1079,1955.
Ganichev et al., “Spin-galvanic effect,”Nature, 417:153-6, 2002.
Gilbert, “A phenomenological theory of damping in ferromagnetic materials,”IEEE Trans. on Magn., 40:3443-9, 2004.
Goennenwein et al., “Electrically detected ferromagnetic resonance,”Appl. Phys. Lett., 90:162507, 2007.
Grollier et al., “Microwave spectroscopy on magnetization reversal dynamics of nanomagnets with electronic detection,”J. Appl. Phys., 100:024316, 2006.
Gui et al., “Electrical detection of the ferromagnetic resonance: spin-rectification versus bolometric effect,”Applied Physics Letters, 91:082503, 2007.
Gui et al., “Quantized spin excitations in a ferromagnetic microstrip from microwave photovoltage measurements,”Phys. Rev. Lett., 98:217603, 2007.
Gui et al., “Realization of a room-temperature spin dynamo: the spin rectification effect,”Phys. Rev. Lett., 98:107602, 2007.
Gui et al., “Resonances in ferromagnetic gratings detected by microwave photoconductivity,”Phys. Rev. Lett., 95:056807, 2005.
Gurney et al., “Spin valve giant magnetoresistive sensor materials for hard disk drives,” In: Ultrathin Magnetic Structures IV, Chapter 6, Springer, Berlin, Chapter 6, pp. 149-175, 2004.
Gurney et al., “Magnetic switching in high-density MRAM,” In: Ultrathin Magnetic Structures IV, Chapter 7, Springer, Berlin, pp. 177-218, 2004.
Gurney et al., “Giant magneto-resistive random-access memories based on current-in-plane devices,” In: Ultrathin Magnetic Structures IV, Chapter 8, Springer, Berlin, pp. 219-252, 2004.
Guru and Hiziroglu, “Waveguides and cavity resonators,” In: Electromagnetic Field Theory Fundamentals, Chapter 10, Cambridge University Press, 2ndEd., pp. 502-546, 2004.
Hu and Ge, “The spin-driven electrical currents,”La Physique au Canada, 63:75-78, 2007.
Hu, “Recent progress in spin dynamics research in Canada,”Physics in Canada, 65:29, 2009.
Hui et al., “Electric detection of ferromagnetic resonance in single crystal iron film,”Appl. Phys. Lett., 93:232502, 2008.
Jan, In:Solid State Physics, Academic, New York, pp. 15-54, 1957.
Juretschke, “Electromagnetic theory of dc effects in ferromagnetic resonance,”J. Appl. Phys., 31:1401, 1960.
Kiselev et al., “Microwave oscillations of a nanomagnet driven by a spin-polarized current,”Nature, 425:380-3, 2003.
Kittel, “On the theory of ferromagnetic resonance absorption,”Phys. Rev., 73:155, 1948.
Kupferschmidt et al., “Theory of the spin-torque-driven ferromagnetic resonance in a ferromagnet
ormal-metal/ferromagnet structure,”Phys. Rev. B., 74:134416, 2006.
Landau and Liftshitz, “On the theory of the dispension of magnetic permeability in ferromagnetic bodies,”Physik. Z Sowjet., 8:153-169, 1935.
Lee and Rhie, “Spin pumping technique and its observation,”IEEE Trans. on Mag., 35:3784, 1999.
Mecking et al., “Microwave photovoltage and photoresitance effects in ferromagnetic microstrips,”Physical Review B, 76:224430, 2007.
Moller and Juretschke, “Determination of spin-wave boundary conditions by dc effects in spin-wave resonance,”Phys. Rev. B., 2:2651, 1970.
Morrish, “Resonance in strongly coupled dipole systems,” In: The Physical Principles of Magnetism, Chapter 10, IEEE Press Classic Reissue, New York, pp. 539-559 2001.
Mosendz et al., “Spin dynamics at low microwave frequencies in crystalline Fe ultrathin film double layers using co-planar transmission lines,”J. Magn. Magn. Mater., 300:174, 2006.
Oh et al., “Evidence of electron-spin wave coupling in CoxNbymagnetic metal thin film,”J. Magn. Magn. Mater., 293:880, 2005.
Polder, “On the theory of ferromagnetic resonance, Chapter VIII,”Philosophical Magazine, 40:99-115, 1949.
Puszkarski, “Theory of syrface states in spin wave resonance,”Prog. Surf Sci., 9:191-247, 1979.
Saitoh et al., “Conversion of spin current into charge current at room temperature: inverse spin-Hall effect,”Appl. Phys. Lett., 88:182509, 2006.
Sankey et al., “Spin-transfer-driven ferromagnetic resonance of individual nanomagnets,”Phys. Rev. Lett., 96:227601, 2006.
Slonczewski, “Current-driven excitation of magnetic multilayers,”J. Magn. Magn. Mater., 159:L1, 1996.
Sodha and Srivasta,Microwave Propagation in Ferrimagnets, Plenum Press, New York, 1981.
Tserkovnyak et al., “Nonlocal magnetization dynamics in ferromagnetic heterostructures,”Rev. Mod. Phys., 77:1375-1421, 2005.
Tulapurkar et al., “Spin-torque diode effect in magnetic tunnel junctions,”Nature, 438:339-42, 2005.
Vonsovskii,Ferromagnetic Resonances: the phenomenon of resonant absorption of a high-frequency magnetic field in ferromagnetic substances, (Pergamon, New York) 38-39, 1966.
Wang et al., “Voltage generation by ferromagnetic resonance at a nonmagnet to ferromagnet contact,”Phys. Rev. Lett., 97:216602, 2006.
Wen, “Coplanar waveguide: a surface strip transmission line suitable for nonreciprocal gyromagnetic device application,”IEEE Trans. Microwave Theory Tech., 17:1087, 1969.
Wirthmann et al., “Broadband electrical detection of spin excitation in Ga0.98Mn0.02As using a photovoltage technique,”Applied Physics Letters, 92:232106, 2008.
Yamaguchi et al., “Rectification of radio frequency current in ferromagnetic nanowire,”
Bai Lihui
Gui Yongsheng
Hu Can-Ming
Mecking Nikolai
Wirthmann Andre
Fulbright & Jaworski L.L.P.
Nguyen Ha Tran T
Nguyen Trung Q
University of Manitoba
LandOfFree
Systems and methods for RF magnetic-field vector detection... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for RF magnetic-field vector detection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for RF magnetic-field vector detection... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2705544