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Akira Shibuya,Masanori Okuyama,Minoru Noda 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
Bi4Ti3O12-SrBi4Ti4O15 thin lms have been prepared on Pt/Ti/SiO2/Si by pulsed laser deposition (PLD) and their crystalline and electrical properties have been characterized. After oxygen annealing, X-ray diraction (XRD) patterns and grain sizes in atomic force microscopy (AFM) images did not change very much. But P-E hysteresis loop measured at 60 Hz has been improved very much after oxygen annealing. The values of 2Pr and 2Ec were 32 C/cm2 and 190 kV/cm, respectively, after oxygen annealing while 2Pr and 2Ec were 20 C/cm2 and 145 kV/cm, respectively, before oxygen annealing. C-V hysteresis loops shows reasonable results compared with P-E hysteresis loops both before and after oxygen annealing. The relative dielectric constant and dielectric loss were 433 and 0.037, respectively, after oxygen annealing while 595 and 0.071 before post annealing. The dielectric constant of BIT-SBTi lm approaches to that of the ceramics which is around 100 at room temperature after oxygen annealing. This improvement of ferroelectrics is mainly attributed to reduction of oxygen vacancies.p탾
Horie, Yukihiro,Meguro, Akira,Kitaichi, Nobuyoshi,Lee, Eun Bong,Kanda, Atsuhiro,Noda, Kousuke,Song, Yeong Wook,Park, Kyung Sook,Namba, Kenichi,Ota, Masao,Inoko, Hidetoshi,Mizuki, Nobuhisa,Ishida, Susu Oxford University Press ; Distributed by Mercury I 2012 Rheumatology Vol.51 No.6
<P>Beh?et's disease is one of the major aetiologies of uveitis causing blindness in Asian countries. A genome-wide association study identified six microsatellite markers as disease susceptibility loci for Japanese patients with Beh?et's disease. To confirm our recent results, these microsatellite markers were examined in a Korean population as a replication study.</P>