Magnetism and electrical transport in Y-doped layered iridate Sr2IrO4

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:528

Article

Bhatti, Imtiaz Noor¹  Pramanik, A. K.¹ 

[1] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India

关键词: Spin-orbit coupling;    Magnetism;    Magnetic oxides;    Electronic transport;    Crystal structure;   

DOI  :  10.1016/j.jmmm.2021.167749

来源: Elsevier

【 摘 要 】

Here, we report an investigation of structural, magnetic and electronic properties in Y-doped layered iridate (Sr1-xYx)(2)IrO4 (x <= 0.1). The parent Sr2IrO4 is a well-studied spin-orbit coupling (SOC) induced insulator with an antiferromagnetic ground state. The Y-doping here equivalently acts for electron doping without altering the vital parameters such as, SOC and electron correlation. Experimental results show a minute change in structural parameters and an equivalent charge conversion from Ir4+ to Ir3+. Unlike similarly other electron-doped system, the low temperature magnetic and electronic state in present series is minimally influenced. The charge conduction mechanism follows 2-dimensional hopping model in whole series. Magnetoresistance (MR) data show an interesting sign change with both temperature and magnetic field. The positive MR both at low temperature follows weak antilocalization behavior where the sign change in MR is believed to be caused by an interplay between SOC and magnetic moment.

【 授权许可】

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