Structural and magnetic properties of MSr2Y1.5Ce0.5Cu2Oz (M-1222) compounds with M=Fe and Co

被引：7

作者：

Awana, VPS

Gupta, A

Kishan, H

Malik, SK

Yelon, WB

Lindén, J

Karppinen, M

Yamauchi, H

Kundaliya, DC

机构：

[1] Natl Phys Lab, New Delhi 110012, India

[2] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[3] Univ Missouri, Grad Ctr Mat Res, Rolla, MO 65409 USA

[4] Abo Akad, Dept Phys, FIN-20500 Turku, Finland

[5] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

[6] Univ Maryland, Ctr Superconduct Res, Dept Phys, College Pk, MD 20742 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 95卷 / 11期

关键词：

D O I：

10.1063/1.1688256

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The MSr2Y1.5Ce0.5Cu2Oz (M-1222) compounds, with M=Fe and Co, have been synthesized through a solid-state reaction route. Both compounds crystallize in a tetragonal structure (space group 14/mmm). A Rietveld structural refinement of the room-temperature neutron diffraction data for Fe-1222 reveals that nearly half the Fe remains at the M site, while the other half goes to the Cu site in the CuO2 planes. Existence of Fe at two different lattice sites is also confirmed by Fe-57 Mossbauer spectroscopy from which it is inferred that similar to50% of the total Fe occupies the Cu site in the CuO2 planes as Fe3+, whereas the other similar to50% is located at the M site with similar to40% as Fe4+ and similar to10% as Fe3+. For the M=Co compound, nearly 84% of Co remains at its designated M site, while the rest occupies the Cu site in the CuO2 planes. (C) 2004 American Institute of Physics.

引用

页码：6690 / 6692

页数：3

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