la0.6sr0.4feo3中反常超聲特性研究

1、 2220 2004 年增刊（35）卷 功 能 材 料6 結(jié) 語信息傳動構(gòu)件在很多方面不同于一般的機械傳動，它要求微型化與高度的可靠性， 除了在構(gòu)件結(jié)構(gòu)設(shè)計以外，還需要對材料的成分、 組織等進行系統(tǒng)而全面的研究，目前這方面的研究還有待進一步深入進行。Characteristics and application of tr ansmission components forinfor mation machineMikio Nishi

2、hata1, Satoshi Kubozono2, LIU Qian-li3, ZHAO Gao-yang4(1. Nippon Bell Parts Co.,L TD.; 2. Nippon Miniature Rope Co.,LTD; 3. Xi'an Helitin Bell Tech 21 Co., LTD.;4. Xi’ an University of Technology, Xi’ an 710048, Chin

3、a)Abstract: The components of transmission play a very important role in enhancing the reliability of informationmachine. The study of minitype, high speed, and reliability is quiet necessary, for these components worked

4、 for a longperiod time under high-speed stress repeatedly in all kinds of environment. In this paper, characteristics andexploitantion of several components are introduced.Key words：miniwire rope；b elt pulley；roller；char

5、acteristics；application（上接第 2215 頁）參考文獻：[1] Schiffer P , Ramirez A P , Bao W, et al. Low TemperatureMagnetoresistance and the Magnetic Phase Diagram ofLa 1-xCaxMnO3. [J]. Phys Rev Lett, 1995, 75: 3336.[2] Mizokawa T, Kho

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10、 Erbiumfrom 4.2 to 300 K. [J]. Phys Rev, 1968, 174: 504.[9] Zhu C F, Zheng R K. Ultrasonic behaviours near differentphase transitions in La 1-xCaxMnO3. [J]. J Phys: CondenseMatter, 2000, 12: 823.Ultrasonic study of La0.6

11、Sr0.4FeO3KONG Hui 1, ZHANG Shi-long 1, LIU Yi 1,2, SU Jin-rui 1, ZHU Chang-fei 1（1. Lab. ofAdvanced functional materials and devices, Department of Materials Science and Engineering,University of Science and Technology o

12、f China, Hefei 230026, China;2. The Department of Basic Curriculum, Guizhou University of Technology, Guiyang 550003, China）Abstract：The longitudinal ultrasonic velocity and resistivity of single phase polycrystalline La

13、0.6Sr0.4FeO3 samplewere systematically measured in the low temperature. It was found that the ultrasonic velocity shows a dramaticalsoftening around 213K, accompanied with an attenuation peak, while no obvious change in

14、resistivity is observed .The relative change of sound velocity is larger than 5%. It was attributed to the local charge ordering state driven bythe electron-phonon interaction, and this interaction originates from Jahn-T