层状钙钛矿结构锰氧化物Ca3Mn2O7的压致结构相变

朱嘉林; 陈良辰; 禹日成; 李凤英; 刘景; 靳常青

doi:10.11858/gywlxb.2001.02.002

层状钙钛矿结构锰氧化物Ca3Mn2O7的压致结构相变

doi: 10.11858/gywlxb.2001.02.002

朱嘉林^1,2,,
陈良辰^1,2,
禹日成^1,2,
李凤英^1,2,
刘景^2,3,
靳常青^1,2

1.
中国科学院物理研究所极端条件实验室和中国科学院凝聚态物理中心，北京 100080；
2.
北京高压科学研究中心，北京 100080；
3.
中国科学院高能物理研究所，北京 100039

详细信息

通讯作者:
朱嘉林

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出版历程
- 收稿日期: 2001-03-02
- 修回日期: 2001-03-02
- 发布日期: 2001-06-05

Pressure-Induced Phase Transitions of Layered Perovskite-Like Manganates Ca3Mn2O7

1.
Laboratory for Extreme Condition Physics, Institute of Physics, Center for Condensed Matter Physics, Beijing 100080, China;
2.
Beijing High Pressure Research Center, Chinese Academy of Sciences, Beijing 100080, China;
3.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China

More Information

Corresponding author: ZHU Jia-Lin

摘要

摘要: 采用金刚石压砧高压装置（DAC），对层状钙钛矿结构锰氧化物Ca3Mn2O7的粉末样品进行了高压能散X射线衍射实验。实验结果表明，在 0～35 GPa压力范围内，Ca3Mn2O7晶体结构发生了两次相变。在1.3 GPa左右，由原来的四方相转变为正交相；在9.5 GPa左右，又由正交相向新的四方相转变。
- Ca3Mn2O7 /
- 同步辐射 /
- 高压X射线衍射
Abstract: In situ energy dispersive X-ray diffraction measurements on layered perovskite like manganates Ca3Mn2O7 under pressure up to 35 GPa were performed by using diamond anvil cell with synchrotron radiation. The results show that two phase transitions occured in layered perovskite-like manganates Ca3Mn2O7 under pressures in the range of 0～35 GPa. The crystal structure changes from tetragonal to orthorhombic at about 1.3 GPa, and then from orthorhombic to tetragonal at about 9.5 GPa, respectively.
- Ca3Mn2O7 /
- synchrotron radiation /
- high pressure X-ray diffraction

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参考文献(6)

Moritomo Y, Asamitsu A, Kuwahara H, et al. Giant Magnetoresistance of Manganese Oxides with a Layered Perovskite Structure [J]. Nature, 1996, 380: 141.

Jin S, Tiefel T H, McCormack M, et al. Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films [J]. Science, 1996, 274: 1698.

Argyiou D N, Mitchell J F, Radaelli P G, et al. Lattice Effects and Magnetic Structure in the Layered Colossal Magnetoresistance Manganite La2-2xSr1+2xMn2O7 [J]. Phys Rev B, 1999, 59(13): 8695.

Kubota M, Fujioka H, Hirota K, et al. Relation between Crystal Magnetic Structures of Layered Manganite La2-2xSr1+2xMn2O7(0.30~0.50) [J]. Journal of the Physical Society of Japan, 2000, 69(10): 1606.

Ganguly R, Siruguri V, Gopalakrishnan I K, et al. Stability of the Layered Sr3Ti2O7 Structure in La1.2(Sr1-xCax)1.8Mn2O7 [J]. J Phys: Condens Matter, 2000, 12: 1683.

Fawcett I D, Kim E, Greenblatt M, et al. Properties of the Electron-Doped Layered Manganates La2-2x+Ca1+2xMn2O7 (0.6x1.0) [J]. Phys Rev B, 2000, 62: 6485.

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