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INFLUENCE OF PURIFICATION ON GLASS FORMABILITY AND THERMOSTABILITY OF METALLIC GLASS Ni_(75)B_(17)Si_8

XING Liqian , CHEN Xichen , Institute of Physics , Academia Sinica , Beijing , ChinaYANG Gencang , ZHOU Yaohe , Northwestern Polytechnic University , Xi'an , ChinaGUO Zhenqi , Northwestern University , Xi'an , China XING Liqian , Postdoctoral , Institute of Physics , Academia Sinica , Beijing 100080 , China

金属学报(英文版)

The glass formability of Ni_(75)B_(17)Si_8 melt and the thermostability of this metallic glass formed from the the melt can be enhanced by eliminating the heterogeneous catalystg. The purification was done by cyclical superheating melt in special glasses and subsequently cyclically superheating it in an electromagnetic levitation apparatus. The purified Ni_(75)B_(17)Si_8 amorphous sample sized up to 20 ~ I0 x 0.5 mm was prepared as four times the thickness of unpurified ones.

关键词: metallic glass , null , null , null

THE SYNTHESIS AND MAGNETOSTRICTION OF P rx Ce 1 x Fe 2 COMPOUNDS

Y.X.Li , G.Z.Xu , J.P.Qu , F.G.Liu and B.W.Wang Hebei University of Technology , Tianjin 300130 , China C.C.Tang.G.H.Wu and W.S.Zhan State Key Laboratory for Magnetism , Institute of Physics , CAS , Beijing 100080 , China C.Zhao Tianjin University , Tianjin 300072 , China S.X.Gao Hebei Normal University , Shijiazhuang 050091 , China

金属学报(英文版)

The synthesis and magnetic properties of Pr xCe 1 x Fe 2 have been investigated. The forma tion of Pr xCe 1 x Fe 2 is found to depend strongly on annealing temperature. Pure single phase compound can be synthesized at ambient pressure when x≤0 5. The main phase of the Laves structure can still be observed up to x=0 8. Magnetostriction increases with in creasing x and a largest saturation magnetostriction 200 ppm is observed for x=0.5.

关键词: magnetostriction , null , null

MAGNETIC PHASE DIAGRAM OF SmMn_2(Ge_(1-x)Si_x)_2 SYSTEM

Y.G. Wang , F.M Yang , C.P. Chen , N Tang , and Q.D. Wang (State Key Laboratory of Magnetism , Institute of Physics , Chinese Academy of Sciences , P.O. Box 603 , Beijing 100080 , China)(Department of Materials Science and Engineering , Zheiang University Hangzhou 310027 , China)

金属学报(英文版)

The magnetic phase diagram (x,T) of the SmMn2(Ge1-xSix)2 system has been studied by susceptibility and magnetization measurement. With increasing silicon concentration the temperature region of ferromagnetic ordering decreases on the phaae diagram.

关键词: magnetic phase diagram , null , null , null

PHASE COMPONENT AND CURIE TEMPERATURE OF Nd_4(Fe_(1-x)Cr_x)_(77.5)B_(18.5)ALLOYS

B.X. Gu , J.R. Zhang , B.G. Shen and H Wang (Department of Physics , Nanjing University , Nanjing 210093 , China)(State Key Lab. of Magnetism , Institute of Physics , Chinese Academy of Sciences , Beijing 100080 , China)(Department of Physics , Southeastern University , Nanjing 210008 , China)

金属学报(英文版)

The phase component and Curie tempemture of Nd4(Fe1-xCrx)77.5B18.5 (0 0.1. The magnetic measurement shows that Curie temperutures of Fe3B and Nd2Fe14B phases decrease with increasing Cr content. The influence of the substitution of Cr for Fe was discussed.

关键词: Nd_4(Fe_(1-x)Cr_x)_(77.5)B_(18.5)alloy , null , null

A Preliminary Raman Investigation of the Lead Titanate Thin Films via Sol-Gel Process

Tao ZHU , Gaorong HAN , Gaoling ZHAO and Zishang DING(Dept. of Materials Science and Engineering , Zhejiang University , Hangzhou 310027 , China)( State Key Lab. of Magnetism , Institute of Physics , Chinese Academy of Sciences , P.O.Box 603 , Beijing 100080 , China)

材料科学技术（英文）

Raman spectra of the PbTiO3 films via sol-gel process were investigated by using a Jobin Yvon U1000 system. Compared with the Raman spectra of the PbTiO3 single crystals, Raman peaks of PbTiOs films shift downward, which is attributed to the stress effect in the PbTiO3 films exerted by the substrate and the size effect on the Raman frequencies

关键词:

Alloy Model for the Stacking Fault Energy

Xiliang NIE , Yumei ZHOU , Lieping ZHONG and Dingsheng WANG(Lab. for Surface Physics , Institute of Physics , Chinese Academy of Sciences , Beijing 100080 , China)Renhui WANG(Dept. of Physics , Wuhan University , Wuhan 430072 , China)Yiying YE(Center of Instrument

材料科学技术（英文）

An accurate and simple model of stacking fault energy for alloys (solid solutions) has beendeveloped based on the embedded-atom method. The calculated value of stacking fault energy35 mJ/m2 for 304 austenitic stainless steel, is in a good agreement with the experimental one,30 mJ/m2. In the present model we find that the Hirth's empirical relationship is also suitablefor alloy.

关键词:

An Anomalous Kerr Loop of LaBaMnO Thin Film

Bihui HOU , Qinlun XU , Shizhuo JI , Tianpei ZHANG and Peng PENG (Dept. of Physics , University of Science & Technology of China , Hefei 230026 , China) Changhe SHANG and Yinjun WANG (State Key Lab. of Magnetism , Institute of Physics , Chinese Academy of Science

材料科学技术（英文）

An anomalous Kerr loop was observed in an oriented LaBaMno film annealed in oxygen. Many tiny crystal columns were observed with scanning tunneling microscope and magnetic force microscope. The magnetic moment m in the column is perpendicular outward to the surface, which forms a surface phase with spin pinning state. This spin pinning results in the obvious asymmetrical Kerr loop of magneto-optical effect when the magnetic field is in the two opposite directions vertical to the surface.

关键词:

SPUTTERING BEHAVIOUR OF IRON SILICIDES UNDER LOW ENERGY Ar~+ ION BOMBARDMENT

Z.X. Cao , E.G. Wang and YX. Ne(State Key Laboratory for Surface Physics , Institute of Physics , Beijing 100080 , China)

金属学报(英文版)

Surface compositions of Fe3Si, FeSi and FeSi2 under 0.1 to 5ke V Ar+ bombaniment have been investigated by using AES method, and the results indicate that the sudece compositions depend strongly on ion enerpy and sample bulk compositions. While in FeSi and FeSi2 only Fe enrichment in the selvage has been observed, in Fe3Si it is Si enriched when the ion enerpy is higher than 31OeV Competition between preferential sputtering and radiation enhanced segmpation is quoted to eoplain this phenomenon.

关键词: preferential sputtering , null , null

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