http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Masayuki Toyoda (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Kim, Bog G.,Toyoda, Masayuki,Park, Janghee,Oguchi, Tamio ELSEVIER SCIENCE 2017 JOURNAL OF ALLOYS AND COMPOUNDS Vol.713 No.-
<P><B>Abstract</B></P> <P>The properties of newly discovered polar ScFeO<SUB>3</SUB> with antiferromagnetic (AFM) ordering are examined using <I>Ab initio</I> calculations and symmetry mode analysis. The GGA + <I>U</I> calculation confirms the stability of polar <I>R</I>3<I>c</I> phase in ScFeO<SUB>3</SUB> and the pressure induced phase transition to non-polar <I>Pnma</I> phase. Octahedron tilting and structural properties as a function of applied pressure have been analyzed. The origin of polar phase is associated with instability of non-polar R 3 ¯ c phase and group theory using the symmetry mode analysis has been applied to understand this instability as well as the spontaneous polarization of polar <I>R</I>3<I>c</I> phase. The magnetic phase transition shows G-type AFM ordering of Fe<SUP>3+</SUP> ion with energy scale of ∼200 meV/f.u., which can be understood by Goodenough-Kanamori theory. The magnetic easy axis calculation with spin orbit coupling confirms antiferromagnetic anisotropy in ScFeO<SUB>3</SUB> and spin canting may be realized within ∼0.2 meV/f.u.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The properties of ScFeO<SUB>3</SUB> with magnetic ordering are examined by <I>Ab initio</I> method. </LI> <LI> Stability of the polar phase is observed in <I>R</I>3<I>c</I> space group. </LI> <LI> The pressure induced phase transition to non-polar <I>Pnma</I> phase are explained. </LI> <LI> The symmetry mode analysis has been applied to understand polar <I>R</I> 3 <I>c</I> phase. </LI> <LI> Antiferromagnetic spin structure with spin canting possibility has been studied. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>(a) Crystal structure and octahedral tilting of ScFeO<SUB>3</SUB> in <I>R3c</I> in [001] projection. Purple big sphere is Sc and red small sphere is Oxygen. (b) Calculated total energy vs. volume in formula unit scale with GGA + <I>U</I> (Fe = 4 eV). (c) Band structure of <I>R</I>3<I>c</I> of ScFeO<SUB>3</SUB> within GGA + <I>U</I> calculation. (d) Energy as a function of spin canting angle between two neighboring spins with opposite directions in the easy axis plane. The data are fitted by polynomial function (solid line).</P> <P>[DISPLAY OMISSION]</P>
-
In-plane Anisotropy of the Magnetic and the Electric Properties of the Fe Pnictide Ba(Fe1−xCox)2As2
Yoshiaki Kobayashi,Akihiro Ichikawa,Masayuki Toyoda,Masayuki Itoh,Masatoshi Sato 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The anisotropy of the electronic and the magnetic properties within the FeAs planes of Co(2%)-doped BaFe2As2 has been investigated by using 75As nuclear magnetic resonance (NMR) measurementson the As (As0) sites with all four nearest neighbor sites occupied by Fe. Even in thetetragonal phase at temperatures above 100 K, two sets of NMR spectra with twofold symmetry ofin-plane Knight shifts and electronic nuclear quadrupole frequencies are observed. They originatefrom two domains with their symmetry axes lying at right angles to each other. The anisotropies ofthe electronic and the magnetic properties become pronounced at 140 K, below which an in-planeanisotropy is reported to appear in electrical resistivity under a pressure along one of Fe-Fe directions. 75As NMR measurements have also been carried out for the As (As1) sites surrounded byone Co and three Fe. From the data, we conclude that the spin susceptibility of As1 is ~1/3 thatof As0 and that the antiferromagnetic spin fluctuation of As1 is fairly suppressed as compared withthat of As0. We discuss these behaviors of the FeAs layer in connection with the impurity-inducedlocal orbital order model proposed by theoretical studies.
-
Jong S. Kim,Vincent Thijs,Matias Yudi,Kazunori Toyoda,Masayuki Shiozawa,Jin Zening,Brian Clapp,Bert Albers,Hans-Christoph Diener 대한뇌졸중학회 2022 Journal of stroke Vol.24 No.3
The online 2021 Asian-Pacific Heart and Brain Summit was organized to present and discuss experiences within leading Asian-Pacific centers with regard to institutional heart and brain teams managing the diagnosis, treatment, and follow-up of cryptogenic stroke (CS) patients with patent foramen ovale (PFO). This manuscript presents a narrative review of presentations and discussions during the summit meeting. Percutaneous PFO closure is an established therapy for CS patients in whom PFO is considered to be causal. Guidelines and consensus statements emphasize the importance of multidisciplinary clinical decision-making regarding PFO closure with the involvement of several clinical specialties, including neurology, cardiology, and hematology. It is also recommended that the patient be closely involved in this process. The heart and brain team is a collaborative platform that facilitates such a multidisciplinary decision-making process and patient involvement. It also creates opportunities for education and evaluation of the healthcare provided to patients with CS. This review provides insights into the implementation, composition, organization, and operation of a heart and brain team. Methods and metrics are suggested to evaluate the team’s role. We suggest that an efficient heart and brain team can implement guideline-recommended multidisciplinary clinical decision-making with regard to PFO closure in CS patients and play an important role in the management of these patients.
-
( Norihiro Furusyo ),( Ahmed H. Walaa ),( Kunimitsu Eiraku ),( Kazuhiro Toyoda ),( Eiichi Ogawa ),( Hiroaki Ikezaki ),( Takeshi Ihara ),( Takeo Hayashi ),( Mosaburo Kainuma ),( Masayuki Murata ),( Jun 대한간학회 2011 Gut and Liver Vol.5 No.4
Background/Aims: Helicobacter pylori infection causes gastritis, peptic ulcers and gastric malignancies, and its eradication has been advocated by many groups. We determined the H. pylori carrier status and eradication rates of patients with chronic hepatitis C virus (HCV) infection. Methods: In total, 76 chronically HCV-infected patients were enrolled for comparison with 228 HCV-noninfected, age- and sex-matched controls. H. pylori infection was confirmed by H. pylori antibody and urea breath testing. Results: The H. pylori infection rate was significantly higher for HCV-infected patients (67 of 76, 88.2%) than for HCV-noninfected controls (158 of 228, 69.3%). Endoscopic fi ndings showed that the rates of gastric ulcers and gastritis were significantly higher for the 67 HCV-infected patients with H. pylori infection (34.3% and 77.6%) than for the 158 HCV-noninfected controls with H. pylori infection (15.2% and 57.6%). Treatment to eradicate H. pylori had a signifi cantly higher success rate for HCV-infected patients (61 of 67, 91.0%) than for HCV-noninfected controls (115 of 158, 72.8%). Conclusions: The markedly high H. pylori eradication rate observed in this study shows that eradication of H. pylori holds promise for the improvement of the long-term health condition of patients with chronic HCV infection. (Gut Liver 2011;5:447-453)
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
