Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1995-06-07
1996-08-06
Evans, Jefferson
Dynamic magnetic information storage or retrieval
Head
Hall effect
257421, 257425, 338 32R, 338 32H, 324251, G11B 537, H01L 2982, G01R 3306
Patent
active
055439888
ABSTRACT:
A magnetic sensor, memory, and magnetic imager has been described for sensing a magnetic field in two directions concurrently incorporating a bar of semiconductor material having a rectangular cross-section, electrodes for introducing current along the length of the semiconductor material, and electrodes positioned on respective corners of the rectangular cross-section at a common distance along the current path whereby the Hall voltage may be detected concurrently in two directions. The memory includes the above magnetic sensor plus a disk having a magnetic layer thereon for storing information, a positioner for moving the disk, a memory control circuit and a signal processor circuit. The magnetic imager includes a plurality of magnetic field sensors positioned in a one or two-dimensional array. The invention overcomes the problem of mapping magnetic fields with high spatial resolution with high magnetic sensitivity in two directions concurrently.
REFERENCES:
patent: 3189762 (1965-05-01), Galpin
patent: 3564402 (1971-02-01), Pittman
patent: 3789311 (1974-01-01), Masuda
patent: 4186481 (1980-02-01), Noguchi et al.
patent: 4236165 (1980-11-01), Kawashima et al.
patent: 4296424 (1981-10-01), Shibasaki et al.
patent: 4315273 (1982-02-01), Yamamoto et al.
patent: 4371905 (1983-02-01), Valstyn et al.
patent: 4420781 (1983-12-01), Sakurai
patent: 4525671 (1985-06-01), Sansom
patent: 4577250 (1986-03-01), Sato et al.
patent: 4584552 (1986-04-01), Suzuki et al.
patent: 4587509 (1986-05-01), Pitt et al.
patent: 4622644 (1986-11-01), Hansen
patent: 4660018 (1987-04-01), Hatch
patent: 4667391 (1987-05-01), Chapuy et al.
patent: 4698522 (1987-10-01), Larsen et al.
patent: 4760285 (1988-07-01), Nelson
patent: 4772929 (1988-09-01), Manchester
patent: 4782375 (1988-11-01), Popovic
patent: 4828966 (1989-05-01), Mallary et al.
patent: 4866854 (1989-09-01), Seltzer
patent: 4987467 (1991-01-01), Popovic
patent: 5055820 (1991-10-01), Kimura et al.
patent: 5057890 (1991-10-01), Falk et al.
patent: 5068826 (1991-11-01), Matthews
patent: 5075247 (1991-12-01), Matthews
patent: 5089991 (1992-02-01), Matthews
patent: 5093753 (1992-03-01), Freiderich et al.
patent: 5166849 (1992-11-01), Fedeli
patent: 5173758 (1992-12-01), Heremans
patent: 5257151 (1993-10-01), Cooper et al.
Fluitman; Jul. 1983; "Hall effect device with both voltage leads on one side of the conductor"; The Institute of Physics.
T. Tamegai et al "Direct observation of the critical state field profile in a YBa.sub.2 Cu.sub.3 O.sub.7-Y single crystal" Phys. Rev. B, 45, 8201 (1992).
T. Tamegai et al "Spatially resolved magnetic hysteresis in a YBa.sub.2 Cu.sub.3 O.sub.7-Y crystal measured by a Hall-probe array", Phys. Rev. B, 4, 2589 (1992).
Y. Sugiyama, "Trends on Recent Development of Semiconductor Magnetic Sensors" Electro Technical Lab Report vol. 54, No. 1, 1990 Suppl. issue.
Y. Sugiyama et al, "Highly-Sensitive Magnetic Sensor Made of AlGaAs/GaAs Heterojunction Semiconductors" Proc. 6th Sensor Symp, 1986 pp. 55-60.
Y. Sugiyama et al, "Highly-Sensitive Split-Contact Magnetoresistor with AlAs/GaAs Superlattice Structure" IEEE Trans. Elec. Devices 36 9 Sep. '89 pp. 1639-1643.
Y. Sugiyama et al, "Highly Sensitive Hall element with Quantum-Well Superlattice Structure" J. Crystal Growth, 95 (1989) 394.
Brady Michael J.
Krusin-Elbaum Lia
Masselink William T.
Santhanam Padmanabhan
Tamegai Tsuyoshi
Evans Jefferson
International Business Machines - Corporation
Trepp Robert M.
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