• Proceedings of the Korean Magnestics Society Conference
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• 2004.06a
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• pp.150-151
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• 2004

• Proceedings of the Korean Magnestics Society Conference
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• 2017.05a
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• pp.48-49
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• 2017

• Proceedings of the Korean Magnestics Society Conference
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• 2016.11a
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• pp.121-122
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• 2016

• Proceedings of the Korean Magnestics Society Conference
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• 2016.11a
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• pp.70-70
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• 2016

• Proceedings of the Korean Magnestics Society Conference
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• 2016.11a
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• pp.138-139
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• 2016

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.11a
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• pp.252-254
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• 2003

A magnetic field sensor is fabricated with superconducting ceramics system. The sensor at liquid nitrogen temperature shows the increase in electrical resistance by applying magnetic field. Actually, the voltage drop across the sensor is changed from zero to a value more than $100{\mu}V$ by the applied magnetic field. The change in electrical resistance depends on magnetic field. The sensitivity of this sensor is 2.9 ohm/T. The increase in electrical resistance by the magnetic field is ascribed to a modification of the Josephson junctions due to the penetrating magnetic flux into the superconducting material.

• Journal of the Korean Magnetics Society
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• v.20 no.6
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• pp.216-221
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• 2010

Magnetic nanocomposites contained iron oxide were synthesized by through cross-linking polymerization of dimethylacetamide (DMAc) solution and toluen solution on the amphiphilic polymer networks based on urethan acrylate nonionomer (UAN) precursor chains. For the study on microscopic structures and magnetic properties of the magnetic nanoparticles, FESEM and XRD and Mossbauer spectroscopy were used. The results investigated show that there are magnetic nanoparticles of $Fe_2O_3$ in samples and the magnetic nanocomposites contained iron oxide in polymer networks of UAN using DMAc solution are more smaller than using toluen solution. All of the Fe ions in the samples present $Fe^{3+}$ and the magnetic property of samples are paramagnetic by superparamagnetic effect at room temperature.

• Proceedings of the Korean Magnestics Society Conference
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• 2002.12a
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• pp.60-61
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• 2002

현재 Magnetic Tunnel Junction는 고밀도 자기저항 헤드 및 비휘발성 메모리(MRAM)등의 자기저항 특성을 이용한 소자에 응용하기 위해 많은 연구가 진행되고 있다[1]. 하지만 Magnetic Tunnel Junction(MTJ)을 실제 소자로서 제작하여 사용하기 위해서는 smooth하고 pinhole이 없으며, 절연층 내부에 disorder나 defect가 없는 절연층을 형성해야 한다. (중략)

• Journal of Magnetics
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• v.19 no.1
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• pp.68-71
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• 2014

Copper doped Zinc Oxide nanofilms were prepared using a simple and low cost wet chemical method. The microstructures, phase structure, Raman shift and optical absorption spectrum as well as magnetization were investigated for the nanofilms. Room temperature ferromagnetism has been observed for the nanofilms. Structural analyses indicated that the films possess wurtzite structure and there are no segregated clusters of impurity phase appreciating. The results show that the ferromagnetism in Copper doped Zinc Oxide nanofilms is driven either by a carrier or defect-mediated mechanism. The present work provides an evidence for the origin of ferromagnetism on Copper doped Zinc Oxide nanofilms.

• Journal of the Korean Magnetics Society
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• v.22 no.4
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• pp.147-156
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• 2012

Recently, there have been considerable interests in various thin film growth techniques with atomically controllable thickness. Among them, atomically controlled pulsed laser deposition (PLD) technique is quite popular. We have developed advanced thin film growth technique using PLD and Reflection high energy electron diffraction (RHEED). Using the technique, the growth of oxide thin films with the precisely controllable thickness has been demonstrated. In addition, our technique can be applied to high quality thin film growth with minimal defect and bulk chemical composition. In this paper, our recent progresses as well as the current research trend on oxide thin films will be summarized.