• Title/Summary/Keyword: LPE method

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Growth of $Er:LiNbO_3$ single crystal thin film with high crystal quality by LPE method (LPE법에 의한 고품질 $Er:LiNbO_3$ 단결정 박막의 성장)

  • Shin, Tong-Il;Lee, Hyun;Shur, Joong-Won;Byungyou Hong;Yoon, Dae-Ho
    • Proceedings of the Korea Association of Crystal Growth Conference
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    • 1999.06a
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    • pp.305-320
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    • 1999
  • It was grown Er2O3 doped LiNbO3 single crystal thin films with high crystal quality by liquid phase epitaxial (LPE) method. Er2O3 was doped with a concentration of 1, 3, and 5 mol% respectively. After the growth of single crystal thin film, we examined the crystallinity and the lattice mismatch along the c-axis between the film and the substrate with the variation of Er2O3 dopant using X-ray double crystal technique. There were no lattice mismatches along the c-axis for the undoped and the films doped with 1 and 3 mol% of Er2O3. For 5 mol% of Er2O3 doped film, there was a lattice mismatch of 7.86x10-4nm along the c-axis.

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Ferromagnetic Resonance Study of an YIG Thin Film Grown by LPE Method (LPE법으로 제조한 YIG 박막에 대한 강자성공명 연구)

  • 이수형;염태호;윤달호;김약연;한기평;이상석
    • Journal of the Korean Magnetics Society
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    • v.9 no.2
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    • pp.85-90
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    • 1999
  • The ferromagnetic resonance study of the magnetostatic wave modes for an YIG thin film, grown by a liquid phase epitaxy method, was performed by an FMR spectrometer at room temperature. The magnetostatic surface wave and backward volume wave modes show periodic excitations in parallel configuration, whereas the complex spectra were observed in perpendicular configuration. The resonance spectra in parallel configuration can be well explained by the Walker and Damon-Eshbach theory. The peak-peak line width of uniform mode was 0.4 Oe. The saturation magnetization $M_s$ of the YIG thin film was calculated as 137 emu/㎤. In order to know the dependence of the magnetostatic modes as a function of the saturation magnetization and the thickness, the (1,1) and (3,1) modes of the magnetostatic backward volume wave were compared and theoretically calculated.

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Temperature Dependence of Magnetostatic Waves on the YIG Single Crystalline Thin Film (YIG 단결정 박막에 대한 정자파의 온도의존성 연구)

  • Lee, Soo-Hyung
    • Journal of the Korean Magnetics Society
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    • v.12 no.5
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    • pp.163-167
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    • 2002
  • In order to study the temperature dependence of the magnetostatic wave modes for an YIG thin film, grown by a liquid phase epitaxy method, The ferromagnetic resonance was performed by an FMR spectrometer in the temperature range -140$\^{C}$∼200$\^{C}$. The magnetostatic surface wave and backward volume wave modes show periodic excitations in parallel configuration. The resonance fields of all modes and intensities decreased with decreasing the temperature. All magnetostatic modes can be well explained by the Walker and Damon-Eshbach theory. The calculated saturation magnetization Ms of the YIG thin film was increased with decreasing the temperature. The line widths of magnetostatic modes changed in various trends with decreasing the temperature.

LPE growth of $La_{2-x}Sr_{x}CuO_{4}$ single-crystalline films

  • Tanaka, Isao;Tanabe, Hideyoshi;Watauchi, Satoshi;Kojima, Hironao
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.9 no.3
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    • pp.299-302
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    • 1999
  • $La_{2-x}Sr_{x}CuO_{4}$ single-crystalline films were prepared on bulk single crystals of Zn-doped $La_{2-x}Sr_{x}CuO_{4}$ as the substrates by LPE technique using two deferent methods. When prepared using an alumina crucible in normal electrical furnace, the $La_{2-x}Sr_{x}CuO_{4}$ films were contaminated with less than 3 at% aluminum from the alumina crucibles. Aluminum contamination either reduced or completely destroyed the superconductivity of the $La_{2-x}Sr_{x}CuO_{4}$ films, For LPE growth by modified TSFZ method using an infrared heating furnace without crucibles, the $La_{2-x}Sr_{x}CuO_{4}$ films of x=0.11 showed superconducting with $Tc_{onset}=36\;K$, which is 10 K higher than that in the $La_{2-x}Sr_{x}CuO_{4}$ bulk single crystals.

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Effect of Annealing for YIG Single Crystal Thick Films (YIG 단결정 후막의 열처리의 효과)

  • 김근영;윤석규;김용탁;이성문;윤대호
    • Journal of the Korean Ceramic Society
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    • v.40 no.9
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    • pp.855-858
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    • 2003
  • When the PbO-based flux system is used in the Liquid Phase Epitaxy (LPE) method for Yttrium Iron Garnet (YIG) thick film, the effect of Pb ions incorporated into the grown crystal; increase the lattice parameter, changed the uniaxial magnetic anisotropy constant (Ku) or conductance of grown film. It exerts a bad influence on physical property such as increasing optical absorption of grown film. The content of the Pb ion in crystal was decreased by volatilization of Pb ion after annealing; therefore, the lattice parameter of film was reduced on an average 0.0115 ${\AA}$ by the the Pb ion.

Effect of Hg-ambient annealing on Hg0.7Cd0.3Te thin films for IR detector (Hg 분위기 열처리에 따른 적외선 감지용 Hg0.7Cd0.3Te 박막의구조적 특성 변화)

  • Kim, Kwang-Chon;Lee, Cha-Hyun;Choi, Won-Chel;Kim, Hyun-Jae;Kim, Jin-Sang
    • Journal of Sensor Science and Technology
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    • v.19 no.5
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    • pp.398-402
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    • 2010
  • The liquid phase epitaxy(LPE) method was widely used to growth of mercury cadmium telluride(MCT) thin films. However, this method lead to Hg-vacancies in MCT thin film, because Hg has high vapor pressure at this temperature range. This is a well known defect in HgCdTe grown by LPE method. In this study, we report the development of techniques for improving the crystalline quality and controlling the composite uniformity of HgCdTe thin films using high- pressure Hg-ambient annealing method. As a result, we achieved the improvement of the composite uniformity of HgCdTe thin films. It was observed by the high angle annular dark field scanning TEM(HAADF-STEM) analysis. Moreover, new HgTe phase and a shrinking of lattice fringe were observed.

Growth and structural properties of ZnO co-doped Er :$ LiNbO_3$ thin films by liquid phase epitaxy method (LPE법에 의한 ZnO co-doped Er :$ LiNbO_3$, 박막의 성장 및 구조적 특성)

  • 심장보;전원남;윤석규;윤대호
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.12 no.1
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    • pp.27-30
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    • 2002
  • ZnO co-doped Er:$LiNbO_3$ single crystal thin films have been grown on $LiNbO_3$ (001) substrate by liquid phase epitaxy (LPE) method. The melts of ZnO co-doped Er:$LiNbO_3$ was fixed $Er_2O_3$, concentration (1 mol%) and different ZnO concentrations 3 and 5 mol%. The crystallinity of ZnO co-doped Er :$LiNbO_3$ films became better than the $LiNbO_3$ substrate. At ZnO 5 mol% concentration, the surface of ZnO co-doped Er:$LiNbO_3$ film is affected by compressive stress along both the perpendicular and the parallel direction. Also the surface of ZnO 3 mol% co-doped Er:$LiNbO_3$film is smoother than the original $LiNbO_3$ substrate surface.

Growth of $La_{2-x}$$Sr_x$Cu$O_4$Single Crystals for Device Application

  • Tanaka, Isao
    • Progress in Superconductivity
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    • v.4 no.1
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    • pp.14-18
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    • 2002
  • We had succeeded to grow bulk sing1e crystals of La/sub 2-x/Sr/sub x/$CuO_4$by the traveling solvent floating zone method (TSFZ), and to prepare La/sub 2-x/Sr/sub x/CuO$_4$single-crystalline thick films on the Zn-doped La$_2$$CuO_4$ substrate by new liquid phase epitaxial technique using an infrared heating furnace (IR-LPE). In this paper, Ireview growth of bulk single crystals and single-crystalline thick films of La/sub 2-x/Sr/sub x/$CuO_4$, and discuss on their device properties to develop high speed integrated electronic devices.

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