Spin Route Flipping in FeCo/RR-P3HT/ NiFe Organic Spin-Valve Device

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2023-09-28 DOI:10.1007/s13391-023-00460-1

Manikandan Gunasekaran, Dhanalakshmi Dhandapani, Manivel Raja Muthuvel

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Abstract

An organic semiconductor (OSC) is a potential material in spintronics which is posses a long spin diffusion length due to its low spin-orbit coupling and hyperfine interaction. Among the OSC P3HT that already exists, in spintronic devices. In this report, An organic spin valve (OSV) device was fabricated using Regioregular Poly 3-hexylthiophene-2,5- diyl (RR-P3HT). The RR-P3HT was used as a spacer layer, with FeCo and NiFe used as bottom and top electrodes, respectively. The device magnetoresistance (MR) was observed to be a positive MR of 2.9% at 50 K while negative MR of 0.6, 0.4, and 0.014% were observed at 150, 200, and 300 K, respectively. Observed AMR is positive at room temperature for Feco and NiFe single layer as 0.08 and 0.18%, respectively. The magnetic electrodes were prepared using Ultra High Vacuum DC magnetron sputtering, and RR-P3HT was prepared using a spin coater. The magnetic properties of the device were studied by vibrating sample magnetometer (VSM) analysis. The VSM results conclude that both electrodes are magnetic materials with different coercive forces. The FeCo and NiFe, both electrodes crystal structures were analyzed from Gracing Incidence X-Ray Diffraction (GI-XRD) using Cobalt K alpha. FeCo and NiFe were the Body-Centered Cubic crystal structures, and the electrode’s JCPDS card numbers are 50–0795 and 37–0474, respectively.

Graphical Abstract

Abstract Image

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FeCo/RR-P3HT/ NiFe 有机自旋阀器件中的自旋路线翻转

有机半导体（OSC）是一种潜在的自旋电子学材料，由于其自旋轨道耦合和超细相互作用较低，因此具有较长的自旋扩散长度。在已有的自旋电子器件中，P3HT 是一种有机半导体。在本报告中，我们使用 Regioregular Poly 3-hexylthiophene-2,5- diyl (RR-P3HT) 制作了一个有机自旋阀（OSV）器件。RR-P3HT 用作间隔层，FeCo 和 NiFe 分别用作底部和顶部电极。器件磁阻（MR）在 50 K 时为正 2.9%，而在 150、200 和 300 K 时分别为负 0.6%、0.4% 和 0.014%。在室温下观察到的 Feco 和 NiFe 单层 AMR 分别为 0.08% 和 0.18%。磁电极采用超高真空直流磁控溅射法制备，RR-P3HT 采用旋涂机制备。通过振动样品磁力计（VSM）分析研究了该器件的磁性能。VSM 分析结果表明，两种电极都是具有不同矫顽力的磁性材料。利用钴 K 阿尔法入射 X 射线衍射（GI-XRD）分析了铁钴和镍铁合金这两种电极的晶体结构。FeCo和NiFe为体心立方晶体结构，电极的JCPDS卡号分别为50-0795和37-0474。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.