The direct observation of ferromagnetic domain of single crystal CrSiTe3

Shenghang Wu,Yoon Soek Oh,Yazhong Wang,Bin Gao,Xueyun Wang,Jiawang Hong,Lihai Wang,Sang-Wook Cheong

doi:10.1063/1.5024576

Abstract

Layered van der Waals interacting system that can be exfoliated to few layers are promising for exploring fundamental physics with rich electronic and optical properties. Combining the emerging phenomenon with long-range magnetic orders could lead to novel potential ultra-compact spintronics. Recently, CrXTe3 (X=Ge, Si) were reported that can persist magnetism after being exfoliated to few layers, however the magnetic domain structure in layered or bulk single crystal has remained unexplored. Here we choose CrSiTe3 single crystal as a model system, combining low-temperature magnetic force microscope, to demonstrate the magnetic domain structure, as well as the domain evolution in the presence of magnetic field, which is consistent with the magnetic behaviors measured by Magnetic Properties Measurement System (MPMS). Our result gives a simple portray of the magnetic properties of single crystal CrSiTe3, which provides a basis for the future research on magnetic layered van der Waals interacting system in potential application at 2-dimensional limit.

Highlights

The past decade has witnessed the rapid development of 2-Dimensional (2D) materials with interlayer van der Waals interaction.[1,2,3,4,5,6]
Layered van der Waals interacting magnetic semiconductors such as CrXTe3 (X=Ge, Si) and CrI3 were discovered,[14,15,16,17] which has attracted enormous attentions, due to the existing of intrinsic ferromagnetism in the exfoliated monolayer/few layers
Though the magnetic response in few layers CrGeTe3 has been demonstrated by magnetooptic Kerr microscopy,[16] the magnetic domain distribution in layered or bulk single crystal has yet been investigated

Summary

Introduction

The past decade has witnessed the rapid development of 2-Dimensional (2D) materials with interlayer van der Waals interaction.[1,2,3,4,5,6] Due to their fascinating properties with novel physics and potential applications in devices, researchers start to search and investigate more layered materials with additional ferroic orders, such as ferroelectricity and ferromagnetism.[7,8,9,10,11,12] These materials are expected to exhibit more fascinating behaviors after exfoliated to monolayer/few layers.[13]. Shenghang Wu,[1,2] Lihai Wang,[3] Bin Gao,[4,5] Yazhong Wang,[4] Yoon Soek Oh,[4,6] Sang-Wook Cheong,[3,4] Jiawang Hong,[1] and Xueyun Wang1,a 1School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China 2School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China 3Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea 4Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA 5Department of Physics, Rice University, Houston, Texas 77005-1827, USA 6Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea (Received 2 February 2018; accepted 7 May 2018; published online 15 May 2018)

Results

Conclusion