IrSr2TbCu2O8, a high-pressure metamagnetic cuprate: Structure, microstructure and properties

IrSr2TbCu2O8, a high-pressure metamagnetic cuprate: Structure, microstructure and properties
复制标题

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
复制
发表时间:
2008
影响因子:
3.3
通讯作者:
M.Ä. Alario-Franco
M.Ä. Alario-Franco
中科院分区:
化学3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

文献摘要

参考文献

被引文献

相似文献

介绍了具有超磁性能的Irsr{sub2}TbCu{sub2}O{sub8}铜酸盐的合成、结构和微观结构。样品是在高达9.2 Gpa的高温和高压下制备的。该结构为四方结构,表现为1212型结构,源于经典的YBaCuO超导体结构,用八面体[Ir-O{sub6}]基团取代了‘链’中的四配位方形平面铜[CuO{sub4}],这些基团在晶胞的基面上形成了类钙钛矿层。X-射线粉末衍射仪(X射线衍射仪)和SAED所谓的斜角晶胞,分别为{subp}xa{subp}x3a{subp}x3a{subp},其中a{subp}是基本的钙钛矿晶胞参数(a{subp}{subp}3.8A),并用高分辨电子显微镜观察到后者的微区织构和一系列非常有趣的扩展缺陷。磁化率测量表明,Tb磁矩之间存在反铁磁相互作用,磁化转变温度为T{subN}{约x}6K,具有负的Weiss温度。用中子衍射法测定了其磁结构。一项详细的磁性研究揭示了一种超磁行为,这是以前在这种类型的铜酸盐中没有观察到的。还进行了比热和电阻率测量,以表征转变。图形摘要:由IrSr{sub2}TbCu{sub2}O{sub8}晶体的c四方长轴(3a{subp})的SAED重建的图像。包括一张单元格图片以供比较。显示已省略。
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.
铁磁超导RuSr_{2}GdCu_{2}O_{8}的缺陷结构
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
源自 Ybco 的新材料:CrSr2RECu2O8(RE = La、Pr、Nd、Eu、Gd、Tb、Dy、Y、Ho、Er、Lu)。
DOI: --
发表时间: 2005
影响因子: 4.6
作者:
R. Ruiz;M. Aguirre;M. Alario
通讯作者: M. Alario
钙镧铁氧体:Ca2LaFe3O8 中的微区织构和氧过量
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