Magnetotransport Mechanism of Individual Nanostructures via Direct Magnetoresistance Measurement in situ SEM

Junwei Zhang; Yong Peng; Hongbin Ma; Senfu Zhang; Yang Hu; Xue Zeng; Xia Deng; Chaoshuai Guan; Rongrong Chen; Yue Hu; Abdul Karim; Kun Tao; Mingjie Zhang; Xixiang Zhang

doi:10.1021/acsami.0c09773

journal article·2020-09-02

Magnetotransport Mechanism of Individual Nanostructures via Direct Magnetoresistance Measurement in situ SEM

Junwei Zhang, Yong Peng, Hongbin Ma, Senfu Zhang, Yang Hu, Xue Zeng, Xia Deng, Chaoshuai Guan, Rongrong Chen, Yue Hu, Abdul Karim, Kun Tao, Mingjie Zhang, Xixiang Zhang

ACS Applied Materials & Interfaces· Volume 12· Issue 35

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Source abstract

Abstract

The accurate magnetoresistance (MR) measurement of individual nanostructures is essential and important for either the enrichment of fundamental knowledge of the magnetotransport mechanism or the facilitation of desired design of magnetic nanostructures for various technological applications. Herein, we report a deep investigation on the magnetotransport mechanism of a single CoCu/Cu multilayered nanowire via direct MR measurement using our invented magnetotransport instrument in situ scanning electron microscope. Off-axis electron holography experiments united with micromagnetic simulation prove that the CoCu layers in CoCu/Cu multilayered nanowires form a single-domain structure, in which the alignment of magnetic moments is mainly determined by shape anisotropy. The MR of the single CoCu/Cu multilayered nanowire is measured to be only 1.14% when the varied external field is applied along the nanowire length axis, which matches with the theoretical prediction of the granular film model. Density functional theory calculations further disclose that spin-dependent scattering at the interface between magnetic and nonmagnetic layers is responsible for the intrinsic magnetotransport mechanism.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Magnetic properties of thin films · Physics of Superconductivity and Magnetism · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology and Electron Microscopy Centre of Lanzhou University, Lanzhou University, Lanzhou 730000, P. R. China

Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, PR China

King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering (PSE) Division, Thuwal 23955-6900, Saudi Arabia

School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou 730070, PR China

School of Life Science and Electron Microscopy Centre of Lanzhou University, Lanzhou University, Lanzhou 730000, P. R. China

Department Physics, Karakorum International University Gilgit-Baltistan 15100, Pakistan

Key Lab of Mineral Resources in Western China (Gansu), School of Earth Sciences, Lanzhou University, Lanzhou 730000, China

Funding

Ministry of Education of the People's Republic of China · National Natural Science Foundation of China

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