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Title: Thickness-dependent magnetic order in CrI3 single crystals

Abstract

Two-dimensional (2D) materials with intrinsic ferromagnetism offers unique opportunity to engineer new functionalities in nano-spintronics. One such material is CrI3, showing long-range magnetic order in monolayer with the Curie temperature (Tc) of 45 K. In this work, we study detailed evolution of magnetic transition and magnetic critical properties in response to systematic reduction in crystal thickness down to 50 nm. Bulk Tc of 61 K is gradually suppressed to 57 K, however, the satellite transition at T*=45 K is observed layer-independent at fixed magnetic field of 1 kOe. The origin of T* is proposed to be a crossover from pinning to depinning of magnetic domain walls. The reduction of thickness facilitates a field-driven metamagnetic transition around 20 kOe with out-of-plane field, in contrast to the continuous changes with in-plane field. The critical analysis around Tc elucidates the mean-field type interactions in microscale-thick CrI3.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1571405
Report Number(s):
BNL-212218-2019-JAAM
Journal ID: ISSN 2045-2322
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, Yu, Wu, Lijun, Tong, Xiao, Li, Jun, Tao, Jing, Zhu, Yimei, and Petrovic, C. Thickness-dependent magnetic order in CrI3 single crystals. United States: N. p., 2019. Web. doi:10.1038/s41598-019-50000-x.
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Liu, Yu, Wu, Lijun, Tong, Xiao, Li, Jun, Tao, Jing, Zhu, Yimei, & Petrovic, C. Thickness-dependent magnetic order in CrI3 single crystals. United States. https://doi.org/10.1038/s41598-019-50000-x
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Liu, Yu, Wu, Lijun, Tong, Xiao, Li, Jun, Tao, Jing, Zhu, Yimei, and Petrovic, C. Thu . "Thickness-dependent magnetic order in CrI3 single crystals". United States. https://doi.org/10.1038/s41598-019-50000-x. https://www.osti.gov/servlets/purl/1571405.
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@article{osti_1571405,
title = {Thickness-dependent magnetic order in CrI3 single crystals},
author = {Liu, Yu and Wu, Lijun and Tong, Xiao and Li, Jun and Tao, Jing and Zhu, Yimei and Petrovic, C.},
abstractNote = {Two-dimensional (2D) materials with intrinsic ferromagnetism offers unique opportunity to engineer new functionalities in nano-spintronics. One such material is CrI3, showing long-range magnetic order in monolayer with the Curie temperature (Tc) of 45 K. In this work, we study detailed evolution of magnetic transition and magnetic critical properties in response to systematic reduction in crystal thickness down to 50 nm. Bulk Tc of 61 K is gradually suppressed to 57 K, however, the satellite transition at T*=45 K is observed layer-independent at fixed magnetic field of 1 kOe. The origin of T* is proposed to be a crossover from pinning to depinning of magnetic domain walls. The reduction of thickness facilitates a field-driven metamagnetic transition around 20 kOe with out-of-plane field, in contrast to the continuous changes with in-plane field. The critical analysis around Tc elucidates the mean-field type interactions in microscale-thick CrI3.},
doi = {10.1038/s41598-019-50000-x},
journal = {Scientific Reports},
number = 1,
volume = 9,
place = {United States},
year = {2019},
month = {9}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1038/s41598-019-50000-x
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Cited by: 7 works
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Figures / Tables:

Figure 1 Figure 1: (a) Low temperature structure of CrI3 in the R$\bar{3}$ space group. (b) Optical microscopy of bulk S0 sample (thickness ∼ 100µm) and cross-section of S2 sample (thickness ∼ 2µm). (c) Transmission electron microscopy (TEM) image of S3 sample in Cu grid along with the low-loss and core-loss electronmore » energy loss spectra (EELS) taken from top right area marked by red circle. The thickness of S3 was calculated from the low-loss EELS based on log-ratio method in Digital Micrograph program to be 44 nm. The average thickness for many areas measured is 49 ±8 nm.« less
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Works referenced in this record:

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    Magnetic anisotropy and entropy change in trigonal Cr 5 Te 8
    journal, December 2019

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