• 한국통신학회:학술대회논문집
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• 한국통신학회 1998년도 추계종합학술발표회 논문집(상)
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• pp.198-201
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• 1998

• 한국자기학회지
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• 제3권2호
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• pp.135-138
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• 1993

Fe-B계 비정질합금에 Al을 치환한 $Fe_{82}B_{18-x}Al_{x}$ 및 $Fe_{80}B_{20-x}Al_{x}$급속응고합금의 포화자왜 인장응력에 의한 자기탄성효과가 조사되었다. 포화자왜는 Al 치환량이 증가 할수록 증가 하며, 비정질 $Fe_{82}B_{14}Al_{14}$합금에서 45 ppm으로 가장 높다. 비정질 $Fe_{82}B_{14}Al_{14}$ 합금의 인장응력에 따른 최대자속밀도의 변화율은 약 $0.026\;T.mm^{2}/N$으로 고분해능 역학센서로 응용이 가능할 것으로 예상된다.

• 열처리공학회지
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• 제21권1호
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• pp.3-9
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• 2008

Al-Co-N thin films, Al-Co-N/Al-N and Al-Co-N/Al-Co multilayers containing various amounts of Co content were deposited by using a two-facing targets type dc sputtering (TFTS) system. The films were also annealed successively and isothermally at different annealing temperatures. Irrespective of Co content and preparation methods, all the as-deposited films were observed non-magnetized. It was found that annealing conditions can control the magnetic and electrical properties as well as the microstructure of the films.

• Korean Chemical Engineering Research
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• 제50권1호
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• pp.72-75
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• 2012

Strain-free AlGaN/GaN 나노선을 기판에 분산시킨 후 E-beam lithography(EBL)를 이용해 단일 나노선 자외선 센서를 제작하였다. 나노선의 구조적, 광학적 특성을 분석하기 위해 focused ion beam(FIB), photoluminescence, micro-Raman spectroscopy를 이용하여 나노선의 strain 및 형태를 조사하였다. 자외선 센서로서의 특성 여부를 확인하기 위하여 빛을 차단 한 조건과 자외선을 조사하는 조건하에서 current-voltage(I-V) 특성을 측정하였으며 각각 9.0 ${\mu}S$과 9.5 ${\mu}S$의 전기전도도(conductance)를 얻었다. 자외선 조사 조건하에서 excess carrier의 증가로 인해 전기전도도가 약 5%가 향상되었음을 알 수 있었다. 자외선을 반복적으로 조사하는 과정의 실험을 통해 우수한 포화 시간(saturation time)과 감쇠 시간(decay time)을 얻었다. 따라서 AlGaN/GaN 나노선은 자외선 센서로서 많은 가능성을 가지고 있음을 확인하였다.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2017년도 임시총회 및 하계학술연구발표회
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• pp.123-123
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• 2017

• 한국재료학회지
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• 제21권1호
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• pp.28-33
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• 2011

This paper describes the fabrication of AlN thin films containing iron and iron nitride particles, and the magnetic and electrical properties of such films. Fe-N-Al alloy films were deposited in Ar and $N_2$ mixtures at ambient temperature using Fe/Al composite targets in a two-facing-target DC sputtering system. X-ray diffraction results showed that the Fe-N-Al films were amorphous, and after annealing for 5 h both AlN and bcc-Fe/bct-$FeN_x$ phases appeared. Structure changes in the $FeN_x$ phases were explained in terms of occupied nitrogen atoms. Electron diffraction and transmission electron microscopy observations revealed that iron and iron nitride particles were randomly dispersed in annealed AlN films. The grain size of magnetic particles ranged from 5 to 20 nm in diameter depending on annealing conditions. The saturation magnetization as a function of the annealing time for the $Fe_{55}N_{20}Al_{25}$ films when annealed at 573, 773 and 873 K. At these temperatures, the amount of iron/iron nitride particles increased with increasing annealing time. An increase in the saturation magnetization is explained qualitatively in terms of the amount of such magnetic particles in the film. The resistivity increased monotonously with decreasing Fe content, being consistent with randomly dispersed iron/iron nitride particles in the AlN film. The coercive force was evaluated to be larger than $6.4{\times}10^3Am^{-1}$ (80 Oe). This large value is ascribed to a residual stress restrained in the ferromagnetic particles, which is considered to be related to the present preparation process.

• 한국자기공명학회논문지
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• 제16권1호
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• pp.67-77
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• 2012

The small molecule binding to the c-Jun N-terminal kinase 3 (JNK3) was examined by the measurements of saturation transfer difference (STD) NMR experiments. The STD NMR experiment of ATP added to JNK3 clearly showed the binding of the nucleotide to the kinase. The STD NMR spectrum of dNTPs added to JNK3 discriminated the kinase-bound nucleotide from the unbound ones. After the five-fold addition of ATP to the dNTPs and JNK3 mixture, only signals of the cognate substrate of JNK3, ATP, were observed from the STD NMR experiment. These results signify that by the STD NMR the small molecules bound to JNK3 can be discriminated from the pool of the unbound molecules. Furthermore the binding mode of the small molecule to JNK3 can be determined by the competition experiments with ATP.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2002년도 동계연구발표회 논문개요집
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• pp.92-93
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• 2002

The substituted lithium ferrites combine useful ferromagnetic properties with high Curie temperature ranging from 55$0^{\circ}C$ to 85$0^{\circ}C$, [1] high saturation magnetization, [2] and low microwave dielectric loss.[3] Saturation magnetization of (Z $n_{1-x}$ F $e_{x}$)A[L $i_{0.5x}$F $e_{ 2-0.5x}$]$_{B}$ $O_4$ increased with zinc concentration, followed by a decrease at x = 0.7.[4] This is attributed to a dilution of the A-site with zinc which initially causes an increase in saturation magnetization due to the dominance of the B-site. (omitted)d))d)d))

• 한국재료학회지
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• 제4권8호
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• pp.952-957
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• 1994

RF & DC magnetron sputtering장치를 이용하여 Ar과 $Ar+N_{2}$혼합가스분위기에서 Fe/Co및 Fe-N/Co-N다층막을 각각 제조하였다. 제작된 다층막을 $100^{\circ}C$ ~ $500^{\circ}C$로 각각 1시간씩 열처리하였다. Fe막의 두께와 열처리 온도에 따른 Fe/Co다층막의 포화자화와 보자력을 측정하고, 투자율을 조사하였다. Fe/Co(70$\AA$/15$\AA$)다층막에서 포화자화는 1.8Oe이다. 보자력은 열처리 온도 $250^{\circ}C$까지는 일정한 값(1.8Oe)을 가지나. $250^{\circ}C$ ~ $300^{\circ}C$에서는 약간 증가하고, $300^{\circ}C$이상에서는 갑자기 증가한다. 질소 유량비($N_{2}/Ar+N_{2}$)가 4%인 조건에서 제작한 Fe-N/Co-N 다층박막의 보자력은 5Oe이고, 열처리 온도가 증가함에 따라 감소하다가 $250^{\circ}C$에서 최소값, 2Oe를 나타내고 그 이상의 온도에서 급격히 증가한다.

• 대한화학회지
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• 제67권4호
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• pp.217-221
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• 2023

A series of hydrophobic dodecyl-terminated 6th-generation poly(amidoamine) dendrimer (H)-encapsulated cadmium sulfide ((CdS)_n@H) nanoparticles in a co-solvent (toluene: methanol = 6.8: 3.2 v/v) are synthesized. The diameters of CdS nanoparticles within the dendrimer were estimated by analyzing the positions of the first excitonic absorption peaks of CdS in UV-vis spectra. The size of the CdS nanoparticle within the dendrimer shows a saturation value as the CdS/H ratio (n) increases, which is believed to be due to the limited physical size of the void cavity within the dendrimer. This simple and convenient method of estimating the saturation of the size of CdS in dendrimers may be useful in determining the maximum void space within other dendrimers under various solvent conditions.