A single crystal of MgAlB4 compared with polycrystalline Mg1-xAlxB2 with x near 0.5

被引：1
|
作者：
Chashka, KB
Fisher, B [1 ]
Kapon, M
Patlagan, L
Reisner, GM
机构：
[1] Technion Israel Inst Technol, Dept Phys, Crown Ctr Superconduct, IL-32000 Haifa, Israel
[2] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 391卷 / 03期
关键词：
X-ray diffraction; superstructure; superconductivity; thermopower;
D O I：
10.1016/S0921-4534(03)01268-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the structure and resistivity of a min size MgAlB4 single crystal (SC). The structure determined from SC X-ray diffraction is in very good agreement with that reported by Margadonna et al. [Phys. Rev. B 66 (2002) 14518]. The resistivity of the SC exhibited a Bloch-Griineisen-like temperature dependence and showed no transition to superconductivity down to 4.5 K. We report also on the structure, temperature dependence of resistivity and thermopower of polycrystalline Mg1-xAlxB2 with x around 0.5, prepared for comparison. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：223 / 229
页数：7
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