Magnetic properties of Fe-doped CuAlO2 and role of impurities

被引：14

作者：

Aziziha, Mina ^{[1
]}

Byard, Seth A. ^{[1
,2
]}

Beesely, Ramon ^{[1
]}

Lewis, James P. ^{[1
]}

Seehra, Mohindar S. ^{[1
]}

Johnson, Matthew B. ^{[1
]}

机构：

[1] West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA

[2] Grove City Coll, Dept Phys, Grove City, PA 16127 USA

来源：

AIP ADVANCES | 2019年 / 9卷 / 03期

关键词：

THERMOELECTRIC PROPERTIES;

D O I：

10.1063/1.5080099

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The delafossite CuAlO2 is a rare p-type semiconductor with potential applications as a thermoelectric and as a dilute magnetic semiconductor when doped with transition metal ions. Reported here are results from our investigations of CuAl(1-x)FexO(2) (x = 0, 0.01, 0.05, and 0.1) with a focus on the x-dependence of structural and magnetic properties, and role of impurities. The samples prepared by the solid-state reaction at 1,100 degrees C were characterized by X-ray diffraction (XRD), energy dispersive (X-ray) spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The magnetic results show that the Curie constant (C), low temperature magnetization (M) and the lattice constants scale with x. High resolution M-H loop measurements at 300 K and 10 K show negligible coercivity He at 10 K but H-C similar to 100 Oe at 300K. These results suggest the presence of minute quantities of hematite (alpha-Fe2O3) that are not detected in our XRD and XPS. The role of impurities on the published results in this system is discussed. (C) 2019 Author(s).

引用

页数：5

共 14 条

[11] Morin transition in hematite: Size dependence and thermal hysteresis [J].