IrSr2TbCu2O8, a high-pressure metamagnetic cuprate: Structure, microstructure and properties
IrSr2TbCu2O8, a high-pressure metamagnetic cuprate: Structure, microstructure and properties
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IrSr2TbCu2O8,一种高压变磁铜酸盐:结构、显微结构和性能
DOI:
10.1016/j.jssc.2008.02.022
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发表时间:
2008
影响因子:
3.3
通讯作者:
M.Ä. Alario-Franco
中科院分区:
文献类型:
--
作者:
A.J. Dos santos-Garcia;J. van Duijn;R. Sa6z-Puche;G. Heymann;H. Huppertz;M.Ä. Alario-Franco
The synthesis, structure and microstructure of the IrSr{sub 2}TbCu{sub 2}O{sub 8} cuprate showing metamagnetic properties are described. The sample was prepared at high temperatures and pressures up to 9.2 GPa. The structure is tetragonal, showing a 1212 type structure, that derives from the classical YBaCuO superconductor structure, replacing the tetracoordinated square planar copper [Cu-O{sub 4}] in the 'chains' by octahedral [Ir-O{sub 6}] groups that form a perovskite-like layer in the basal plane of the unit cell. A 'simple' cell, {approx}a{sub p}xa{sub p}x3a{sub p}, where a{sub p} is the basic perovskite unit cell parameter (a{sub p}{approx}3.8 A), is supported by X-ray powder diffraction (XRD) and a so-called 'diagonal' one, {approx}{radical}2a{sub p}x{radical}2a{sub p}x3a{sub p}, by SAED; a microdomain texture of latter cell and a series of very interesting extended defects have been observed by HREM. Magnetic susceptibility measurements show a magnetic transition, T{sub N}{approx}6 K, with negative Weiss temperature, that indicates antiferromagnetic interactions among the Tb moments. The magnetic structure has been determined by neutron diffraction. A detailed magnetic study has revealed a metamagnetic behavior, something not previously observed in this type of cuprates. Specific heat and resistivity measurements have also been performed to characterize the transition. - Graphical abstract: Reconstructed image from the SAED of the long c tetragonal axis (3a{sub p}) of a IrSr{sub 2}TbCu{sub 2}O{sub 8} crystal. A unit cell picture is included for comparison. Display Omitted.
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DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
O. Lebedev;G. Tendeloo;J. Attfield;A. Mclaughlin
通讯作者:
A. Mclaughlin
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
J. Tallon;J. Loram;G. Williams;C. Bernhard
通讯作者:
C. Bernhard
影响因子:
4.6
作者:
R. Ruiz;M. Aguirre;M. Alario
通讯作者:
M. Alario
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
M. Alario;M. J. R. Henche;M. Vallet;J. Calbet;J. Grenier;A. Wattiaux;P. Hagenmuller
通讯作者:
P. Hagenmuller
DOI:
10.1007/bf01303701
发表时间:
1986-01-01
期刊:
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
影响因子:
--
作者:
BEDNORZ, JG;MULLER, KA
通讯作者:
MULLER, KA