MAGNETIC-STRUCTURE OF THE SOLID-SOLUTION UNICUSI2 - NEUTRON-DIFFRACTION VERSUS AC-SUSCEPTIBILITY MEASUREMENTS

被引：7

作者：

KUZNIETZ, M ^{[1
]}

ANDRE, G ^{[1
]}

BOUREE, F ^{[1
]}

PINTO, H ^{[1
]}

ETTEDGUI, H ^{[1
]}

MELAMUD, M ^{[1
]}

机构：

[1] NUCL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 73卷 / 10期

关键词：

D O I：

10.1063/1.353474

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystalline samples of the solid solution UNiCuSi2 have ThCr2Si2-type crystallographic structure. ac susceptibility indicates an antiferromagnetic (AF) transition at T(N) = 150 +/- 5 K, followed by four transitions with ferri/ferromagnetic (F) character at 110 +/- 5, 90 +/- 5, 70 +/- 5, and 45 +/- 5 K. Neutron diffraction shows that apart from the AF transition at T(N) = 150 +/- 1 K, in accordance with the ac susceptibility, none of the other F transitions is observed. The magnetic structure, down to 1.7 K, is AF-I, with uranium moments (2.25 +/- 0.10mu(B) at 1.7 K) along the tetragonal axis in ferromagnetic planes, stacked antiferromagnetically ( + - + - ) along the tetragonal axis, with a wave vector k = (0,0,1). A possible explanation for the difference between the ac susceptibility and neutron-diffraction results is discussed.

引用

页码：6075 / 6077

页数：3

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