Observation of Water Level and Temperature Properties by using a Giant Magnetoresistance-Spin Valve Film

Choi, Jong-Gu; Park, Kwang-Jun; Lee, Sang-Suk

doi:10.4283/jmag.2012.17.3.214

Journal of Magnetics

2012

DOI: 10.4283/jmag.2012.17.3.214

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Observation of Water Level and Temperature Properties by using a Giant Magnetoresistance-Spin Valve Film

Jong-Gu Choi¹,

Kwang-Jun Park²,

Sang-Suk Lee³

Abstract: The water level and temperature properties for the cooling system of potassium titanyl phosphate laser systems were observed. The middle point of the GMR-SV magnetoresistance curve is set in the neighborhood of high magnetic sensitivity (2.8 %/Oe). The experimental results for resistance dependence on water height and temperature showed linear regions with rates of 0.4 Ω/mm and 0.1 Ω/°C, respectively. The proposed results were found to be for adjusting the water level and temperature in the laser cooling syste… Show more

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2015

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Cited by 3 publications

References 18 publications

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Properties of Exchange Bias Coupling Field and Coercivity Using the Micron-size Holes Formation Inside GMR-SV Film

Bolormaa¹,

Khajidmaa²,

Hwang³

et al. 2015

Journal of the Korean Magnetics Society

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The holes with a diameter of 35 µm inside the GMR-SV (giant magnetoresistance-spin valve) film were patterned by using the photolithography process and ECR (electron cyclotron resonance) Ar-ion milling. From the magnetoresistance curves of the GMR-SV film with holes measuring by 4-electrode method, the MR (magnetoresistance ratio) and MS (magnetic sensitivity) are almost same as the values of initial states. On other side hand, the H e x (exchange bias coupling field) and H c (coercivity) dominantly increased from 120 Oe and 10 Oe to 190 Oe and 41 Oe as increment of the number of holes inside GMR-SV film respectively. These results were shown to be attributed to major effect of EMD (easy magnetic domian) having a region positioned between two holes perpendicular to the sensing current. On the basis of this study, the fabrication of GMR-SV applying to the hole formation improved the magnetoresistance properties having the thermal stability and durability of bio-device.

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Properties of Exchange Bias Coupling Field and Coercivity Using the Micron-size Holes Formation Inside GMR-SV Film

Bolormaa¹,

Khajidmaa²,

Hwang³

et al. 2015

Journal of the Korean Magnetics Society

View full text Add to dashboard Cite

show abstract

Fabrication and Performance of Electron Cyclotron Resonance Ion Milling System for Etching of Magnetic Film Device

Lee¹,

Hwang²,

Lee³

et al. 2015

Journal of the Korean Magnetics Society

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Distribution of Magnetic Field Depending on the Current in the μ-turn Coil to Capture Red Blood Cells

Lee¹,

Chung²,

Kim³

et al. 2015

Journal of the Korean Magnetics Society

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The µ-turn coil having a width of µm on the GMR-SV (giant magnetoresistance-spin valve) device based on the antiferromagnetic IrMn layer was fabricated by using the optical lithography process. In the case of GMR-SV film and GMR-SV device, the magnetoresistance ratios and the magnetic sensitivities are 4.4 %, 2.0 %/Oe and 1.6 %, 0.1 %/Oe, respectively. In the y-z plane the distribution of magnetic field of GMR-SV device and 10 µ-turns coil which put under the several magnetic bead(MB)s with a diameter of 1 µm attached to RBC (red blood cell) was analyzed by the computer simulation using the finite element method. When the AC currents of 20 kHz from 0.1 mA to 10.0 mA flow to the 10 turns µ-coil, the magnetic field at the position of z = 0 µm at the center of coil was calculated from 30.1 µT to 3060 µT in proportion to the current. The magnetic field at the position of z = 10 µm was decreased to one-sixth of that of z = 0 µm. It was confirmed that the 10 µ-turn coil having enough magnitude of magnetic field for the capture of RBC is possible to use as a biosensor for the detection of magnetic beads attached to RBC.

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Observation of Water Level and Temperature Properties by using a Giant Magnetoresistance-Spin Valve Film

Cited by 3 publications

References 18 publications

Properties of Exchange Bias Coupling Field and Coercivity Using the Micron-size Holes Formation Inside GMR-SV Film

Properties of Exchange Bias Coupling Field and Coercivity Using the Micron-size Holes Formation Inside GMR-SV Film

Fabrication and Performance of Electron Cyclotron Resonance Ion Milling System for Etching of Magnetic Film Device

Distribution of Magnetic Field Depending on the Current in the μ-turn Coil to Capture Red Blood Cells

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