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나노 구조 물리 연구단
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Tuning the Spin-Alignment of Interstitial Electrons in Two-Dimensional Y2C Electride via Chemical Pressure

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Title
Tuning the Spin-Alignment of Interstitial Electrons in Two-Dimensional Y2C Electride via Chemical Pressure
Author(s)
Jongho Park; Jae-Yeol Hwang; Kyu Hyoung Lee; Seong-Gon Kim; Kimoon Lee; Sung Wng Kim
Publication Date
2017-12
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.139, no.48, pp.17277 - 17280
Publisher
AMER CHEMICAL SOC
Abstract
We report that the spin-alignment of interstitial anionic electrons (IAEs) in two-dimensional (2D) interlayer spacing can be tuned by chemical pressure that controls the magnetic properties of 2D electrides. It was clarified from the isovalent Sc substitution on the Y site in the 2D Y2C electride that the localization degree of IAEs at the interlayer becomes stronger as the unit cell volume and c-axis lattice parameter were systematically reduced by increasing the Sc contents, thus eventually enhancing superparamagnetic behavior originated from the increase in ferromagnetic particle concentration. It was also found that the spin-aligned localized IAEs dominated the electrical conduction of heavily Sc-substituted Y2C electride. These results indicate that the physcial properties of 2D electrides can be tailored by adjusting the localization of IAEs at interlayer spacing via structural modification that controls the spin instability as found in three-dimensional elemental electrides of pressurized potassium metals. © 2017 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4316
ISSN
0002-7863
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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