Stability and local electronic properties of Al3M (M=Zr,Hf):: An NMR study -: art. no. 195104

被引：22

作者：

Lue, CS ^{[1
]}

Xie, BX ^{[1
]}

Horng, SN ^{[1
]}

Su, JH ^{[1
]}

Lin, JY ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Phys, Tainan 70101, Taiwan

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.71.195104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al-27 NMR measurements were performed on the D0(23)-structure trialuminides Al3Zr and Al3Hf. The Knight shifts, quadrupole splittings. and spin-lattice relaxation times for each of the three crystallographic sites have been resolved. Universally small Fermi-contact Knight shifts and long relaxation times are found for both alloys. Results provide a measure of s-character Fermi-level density of states N-s(E-F) and all indication of orbital weights. In addition, there is evidence that N-s(E-F) correlates with the structural stability of the studied materials. Our NMR measurements confirm that Al3Zr is more stable than Al3Hf with respect to the D0(23) structure.

引用

页数：5

共 35 条

[1]

ABRAGAM A, 1982, PRINCIPLES NUCL MAGN

[2] THEORETICAL AND EXPERIMENTAL-STUDY OF RELAXATIONS IN AL3TI AND AL3ZR ORDERED PHASES [J].