Abstract:
A sensing device includes a sensor, a control unit, an input/output (I/O) interface, and a non-volatile magnetic memory device having one or more memory cells, each of the memory cells, wherein each memory cell of the non-volatile magnetic memory device includes a magnetic switch including a magnetic component and a write coil located proximate the magnetic component, the write coil coupled to receive a current sufficient to create a remnant magnetic polarity in the magnetic component, and a Hall sensor, positioned proximate the magnetic component, to detect the remnant magnetic polarity indicative of a stored data bit.
Abstract:
PROBLEM TO BE SOLVED: To provide a minute magnetic substance or an MRAM using the same in the minute magnetic substance of the nano-scale, which can control the direction of magnetization and is freed from limitation in the number of times of updating and writing processes. SOLUTION: In the method of manufacturing a minute magnetic substance and an MRAM using the same substance, the substance is formed of a flat plate type ferro-magnetic substance, the shape of the flat surface has the line symmetrical axis and is asymmetrical in the direction perpendicular to the line symmetrical axis, and the annular single magnetic domain is formed when the parallel external magnetic field disappears. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To reduce a writing current value by reducing an area of a magnetoresistance effect element. SOLUTION: The magnetic random access memory is provided with a magnetoresistance effect element MTJ having a fixed layer 11 having a fixed magnetization direction, a recording layer 12 having a reversible magnetization direction and a non-magnetic layer 13 provided between the fixed layer and the recording layer, wherein a cavity portion 20a is formed on the center of the recording layer, and the magnetization directions of the fixed layer and the recording layer become a parallel or counterparallel status depending on the direction of a current to be applied between the fixing layer and the recording layer; an insulating layer 20 formed in the cavity portion; a wiring 22 connected to one end of the magnetoresistance effect element; and a transistor Tr connected to the other end of the magnetoresistance effect element. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a nonvolatile memory device with a magnetoresistive element wherein inversion magnetic filed in a memory layer is small, and which consists of a magnetoresistive element of high uniaxial magnetic anisotropy. SOLUTION: Ferromagnetic layers 18, 22 have magnetization in such a magnetization direction as to cancel each other, and the magnetization is roughly zero as a whole of the ferromagnetic layers 18, 22. That is, the ferromagnetic layers 18, 22 are subjected to exchange coupling via a non-magnetic layer 20, and form an SAF structure. Since magnetization of the ferromagnetic layers 18, 22 forming the SAF structure is roughly zero generally, magnetization of a memory layer RL is decided on magnetization of the ferromagnetic layer 14. Consequently, a ferromagnetic layer 14 is formed of a CoFeB alloy of high uniaxial magnetic anisotropy, and the ferromagnetic layers 18, 22 are formed of a CoFe alloy of high exchange coupling force. COPYRIGHT: (C)2007,JPO&INPIT