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arXiv 1006.2147cond-mat.supr-concond-mat.str-el
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Ba(1-x)Sr(x)Fe2As2和Sr(1-x)Ca(x)Fe2As2固溶体中的均匀化学压效应

Uniform chemical pressure effect in solid solutions Ba(1-x)Sr(x)Fe2As2 and Sr(1-x)Ca(x)Fe2As2

Shanta R. Saha, Kevin Kirshenbaum, Nicholas P. Butch, Peter Y. Zavalij, Johnpierre Paglione

摘要:

研究了碱土金属替代对自熔法生长的Ba(1-x)Sr(x)Fe_2As_2和Sr(1-x)Ca(x)Fe_2As_2单晶结构参数的影响。单晶和粉末X-射线衍射测量的结果表明一个连续的单调下降的a-和c-轴的晶格参数,c/a的tetrahydroxide比,和单位晶胞体积与减少碱土金属原子半径的Vegard定律所预期的。结果,该系统在从Ba(1-x)Sr(x)Fe 2As 2中的x=0到Sr(1-x)Ca(x)Fe 2As 2中的x=1的相图中经历连续增加的化学压力效应。

英文摘要:

The effect of alkaline earth substitution on structural parameters was studied in high-quality single crystals of Ba(1-x)Sr(x)Fe2As2 and Sr(1-x)Ca(x)Fe2As2 grown by the self-flux method. The results of single-crystal and powder x-ray diffraction measurements suggest a continuous monotonic decrease of both a- and c-axis lattice parameters, the c/a tetragonal ratio, and the unit cell volume with decreasing alkaline earth atomic radius as expected by Vegard's law. As a result, the system experiences a continuously increasing chemical pressure effect in traversing the phase diagram from x=0 in Ba(1-x)Sr(x)Fe2As2 to x=1 in Sr(1-x)Ca(x)Fe2As2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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