Abstract: Provided is a magnetic sensor for detecting a magnetic field. The magnetic sensor includes a magnetic layer of a closed loop shape; a pair of current terminals which face each other contacting with the closed loop and through which current is input/output; and a pair of voltage terminals which face each other contacting with the closed loop and from which output voltage is detected. Both an anisotropic magnetoresistance effect (AME) and a planar Hall effect (PHE) contribute to the output voltage and a hysteresis of the output voltage is eliminated by exchange coupling of a ferromagnetic layer by a ferromagnetic-antiferromagnetic layer structure and a ferromagnetic-metal-antiferromagnetic layer structure. Accordingly, it is possible to minimize a hysteresis due to a demagnetization factor of the closed loop, stabilize the output voltage of the magnetic sensor and enhance sensitivity.

Abstract: Provided are a barcode nano-wire for decoding a hard magnetic segment by using highly sensitive magnetic sensors and a bio-sensing system using the barcode nano-wire. Integration of hard magnetic and non-magnetic segments produces the barcode nanowire and magnetic segments are detected using highly sensitive magnetoresistance sensors. The non-magnetic segment uses a non-magnetic material and a specific biomolecule for bioanalysis is immobilized at a specific portion of the barcode nano-wire. The hard magnetic material has an advantage of higher coercivity and high remanence magnetization, which is considered as an important parameter in selecting the material. The hard magnetic segments produce distinguishable strong stray fields for individually detecting segments using conventional magnetic sensors for multiplexed bioanalysis.

Abstract: Provided is a stray field collector (SFC) pad and a bio-molecule sensing module or a biochip using the same, and more particularly, a SFC pad, in which probe or detection molecules are attached to a plurality of magnetic labels (magnetic particles or beads) and they are bonded to complementary molecules to enhance a stray field sensor signal of the magnetic labels remaining in the vicinity of the sensor, and a bio-molecule sensing module and a biochip using the same. The provided is related to qualitative as well as quantitative detection of magnetic labels, and the SFC pad which can increase an effective surface area sensitive to the magnetic labels by probe-detection molecular bond in a magnetic biosensor and collect the resultant stray field can enhance sensitivity, accuracy and resolution of the magnetic biosensor.

Abstract: Provided are a barcode nano-wire for decoding a hard magnetic segment by using highly sensitive magnetic sensors and a bio-sensing system using the barcode nano-wire. Integration of hard magnetic and non-magnetic segments produces the barcode nanowire and magnetic segments are detected using highly sensitive magnetoresistance sensors. The non-magnetic segment uses a non-magnetic material and a specific biomolecule for bioanalysis is immobilized at a specific portion of the barcode nano-wire. The hard magnetic material has an advantage of higher coercivity and high remanence magnetization, which is considered as an important parameter in selecting the material. The hard magnetic segments produce distinguishable strong stray fields for individually detecting segments using conventional magnetic sensors for multiplexed bioanalysis.

Abstract: Provided is a magnetic sensor for detecting a magnetic field. The magnetic sensor includes a magnetic layer of a closed loop shape; a pair of current terminals which face each other contacting with the closed loop and through which current is input/output; and a pair of voltage terminals which face each other contacting with the closed loop and from which output voltage is detected. Both an anisotropic magnetoresistance effect (AME) and a planar Hall effect (PHE) contribute to the output voltage and a hysteresis of the output voltage is eliminated by exchange coupling of a ferromagnetic layer by a ferromagnetic-antiferromagnetic layer structure and a ferromagnetic-metal-antiferromagnetic layer structure. Accordingly, it is possible to minimize a hysteresis due to a demagnetization factor of the closed loop, stabilize the output voltage of the magnetic sensor and enhance sensitivity.

Abstract: Provided is a stray field collector (SFC) pad and a bio-molecule sensing module or a biochip using the same, and more particularly, a SFC pad, in which probe or detection molecules are attached to a plurality of magnetic labels (magnetic particles or beads) and they are bonded to complementary molecules to enhance a stray field sensor signal of the magnetic labels remaining in the vicinity of the sensor, and a bio-molecule sensing module and a biochip using the same. The provided is related to qualitative as well as quantitative detection of magnetic labels, and the SFC pad which can increase an effective surface area sensitive to the magnetic labels by probe-detection molecular bond in a magnetic biosensor and collect the resultant stray field can enhance sensitivity, accuracy and resolution of the magnetic biosensor.

Abstract: A voltage-controlled magnetization reversal writing type Magnetic Random Access Memory (MRAM) device. The MRAM device includes electrically conductive base electrodes, a piezoelectric layer, an insulation layer, a free ferromagnetic layer, a nonmagnetic layer, a pinned ferromagnetic layer, an antiferromagnetic layer and two electrically conductive reading lines. The electrically conductive base electrodes are provided with two writing lines having positive and negative electrodes. The left and right surfaces of piezoelectric layer are disposed to abut the writing lines of the electrically conductive base electrodes, respectively. The insulation layer is disposed beneath the piezoelectric layer and is formed to separate the positive and negative electrodes. The free ferromagnetic layer is disposed on the insulation layer. The nonmagnetic layer is disposed on the free ferromagnetic layer. The pinned ferromagnetic layer is disposed on the nonmagnetic layer.

Abstract: A voltage-controlled magnetization reversal writing type Magnetic Random Access Memory (MRAM) device. The MRAM device includes electrically conductive base electrodes, a piezoelectric layer, an insulation layer, a free ferromagnetic layer, a nonmagnetic layer, a pinned ferromagnetic layer, an antiferromagnetic layer and two electrically conductive reading lines. The electrically conductive base electrodes are provided with two writing lines having positive and negative electrodes. The left and right surfaces of piezoelectric layer are disposed to abut the writing lines of the electrically conductive base electrodes, respectively. The insulation layer is disposed beneath the piezoelectric layer and is formed to separate the positive and negative electrodes. The free ferromagnetic layer is disposed on the insulation layer. The nonmagnetic layer is disposed on the free ferromagnetic layer. The pinned ferromagnetic layer is disposed on the nonmagnetic layer.

Abstract: The present invention relates to an apparatus for measuring stress in a thin film and method of manufacturing a probe used therefor. The stress measurement apparatus of the present invention comprises a light source unit, a sensor unit which introduces light from the light source to the backside of a substrate and introduces the light reflected therefrom to a photodetector, a photodetector, and a unit which processes the intensity of detected light through an amplification. The sensor unit is a fiber-optic bundle probe which comprises a plurality of input optical-fiber strands, a plurality of output optical-fiber strands that are placed symmetrically around each of the input optical-fiber strands, and a capillary tube for integrating these optical-fiber strands by inserting them therein. In the arrangement of the optical-fiber strands, a simulation program can be used which simulates the experimental results for the best sensitivity.