http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Peculiar Magnetic Properties of the Half-metallic Co_2CrAl Heusler Alloy
김기원,이주열,이영백,Yury V. Kudryavtsev,Valery G. Prokhorov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.5
A giant negative magnetization in the Co_2CrAl compounds, inboth bulk and thin film, below a certain temperature (T_z) wasobserved. Above T_z, the compound behaves as an ordinaryferromagnet. The negative magnetic alignment might be initiated bythe Landau diamagnetism because of the half-metallic propertiesand the pinning of the negative magnetization is preserved by thepeculiar electronic structures.
Electronic Structures and Magnetic Properties of Co2CrAl Films
김기원,이영백,현영훈,박상윤,이주열,Yury V. Kudryavtsev,V. A. Oksenenko,Janusz Dubowik 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
In this study, Co2CrAl Heusler alloy (HA) films with significantly different structural orders were fabricated and the in fluence of atomic disorder on various physical properties was investigated. We found that the lattice constant of the films gradually increased as the structural disorder increased. We also showed that the ordered Co2CrAl HA films were ferromagnetically ordered with a Curie temperature close to that of the bulk sample. The structural disorder causes a reduction in the saturation magnetization and the decrease in the Curie temperature. As the structural order was increased, the main peak of the Co L3-edge spectrum shifted to a higher energy. The observed experimental results were analyzed in connection with changes in the atomic and the electronic structures.
Electronic structures and relevant physical properties of Ni2MnGa alloy films
Kiwon Kim,Jinbae Kim,Jooyull Rhee,Meidong Huang,Nina Lee,이영백,Yurie Kudryavtsev 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.1
The electronic structures and physical properties of the ordered and disordered Ni2MnGa alloy lms were investigated in this study. Ordered and disordered Ni2MnGa alloy lms were prepared by ash evaporation onto substrates maintained at 720 K and 150 K, respectively. The results show that the ordered lms behave in nearly the same way as the bulk Ni2MnGa ferromagnetic shape-memory alloy, including the martensitic transformation at 200 K. It was also revealed that the lm deposition onto substrates cooled by liquid nitrogen leads to the formation of a substantially-disordered or an amorphous phase which is not ferromagnetically ordered at room temperature. An annealing of such an amorphous lm restores its crystallinity and also recovers the ferromagnetic order. It was also claried how the structural disordering in the lms in uences the physical properties, including the loss of ferromagnetism in the disordered lms, by performing electronic-structure calculations and a photoemission study.