Temperature-dependent magnetic and local structural properties of diamagnetic α-HgI2

Sunmog Yeo; Jae Kuan Son; Chang In Park; In Hui Hwang; Zhenlan Jin; Jang Ho Ha; Sang Wook Han

doi:10.1016/j.cap.2016.06.008

Temperature-dependent magnetic and local structural properties of diamagnetic α-HgI₂

Sunmog Yeo
, Jae Kuan Son
, Chang In Park
, In Hui Hwang
, Zhenlan Jin
, Jang Ho Ha
, Sang Wook Han^*

^*Corresponding author for this work

Physics Education

Research output: Contribution to journal › Journal article › peer-review

4 Scopus citations

Abstract

We examined the temperature-dependent magnetic and structural properties of α-HgI₂ in the temperature range of 300-400 K using temperature-dependent DC-magnetization, x-ray diffraction (XRD), and x-ray absorption fine structure (XAFS) measurements. DC-magnetization measurements of α-HgI₂ single crystals show a sudden reduction of diamagnetic susceptibility for T > 350 K. XRD measurements with Rietveld refinements reveal a small but substantial amount of decrease in disorder in both Hg and I sites above 350 K, with neither a structural transition nor vacancies in the temperature range. XAFS demonstrates a shift of the I K edge for T > 350 K but no changes at the Hg L₃ edge. A stronger bonding of Hg-I pairs above 350 K likely affects the electrons in the outermost shells of iodine atoms and enhances the intrinsic paramagnetic properties, thereby producing a reduction in diamagnetism.

Original language	English
Pages (from-to)	1081-1087
Number of pages	7
Journal	Current Applied Physics
Volume	16
Issue number	9
DOIs	https://doi.org/10.1016/j.cap.2016.06.008
State	Published - 2016.09.1

Keywords

Diamagnetic property
HgI
Structure
XAFS

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

Access to Document

10.1016/j.cap.2016.06.008

Cite this

@article{e10497255cdf42d48726835d92cf49d0,

title = "Temperature-dependent magnetic and local structural properties of diamagnetic α-HgI2",

abstract = "We examined the temperature-dependent magnetic and structural properties of α-HgI2 in the temperature range of 300-400 K using temperature-dependent DC-magnetization, x-ray diffraction (XRD), and x-ray absorption fine structure (XAFS) measurements. DC-magnetization measurements of α-HgI2 single crystals show a sudden reduction of diamagnetic susceptibility for T > 350 K. XRD measurements with Rietveld refinements reveal a small but substantial amount of decrease in disorder in both Hg and I sites above 350 K, with neither a structural transition nor vacancies in the temperature range. XAFS demonstrates a shift of the I K edge for T > 350 K but no changes at the Hg L3 edge. A stronger bonding of Hg-I pairs above 350 K likely affects the electrons in the outermost shells of iodine atoms and enhances the intrinsic paramagnetic properties, thereby producing a reduction in diamagnetism.",

keywords = "Diamagnetic property, HgI, Structure, XAFS",

author = "Sunmog Yeo and Son, \{Jae Kuan\} and Park, \{Chang In\} and Hwang, \{In Hui\} and Zhenlan Jin and Ha, \{Jang Ho\} and Han, \{Sang Wook\}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = sep,

day = "1",

doi = "10.1016/j.cap.2016.06.008",

language = "English",

volume = "16",

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journal = "Current Applied Physics",

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TY - JOUR

T1 - Temperature-dependent magnetic and local structural properties of diamagnetic α-HgI2

AU - Yeo, Sunmog

AU - Son, Jae Kuan

AU - Park, Chang In

AU - Hwang, In Hui

AU - Jin, Zhenlan

AU - Ha, Jang Ho

AU - Han, Sang Wook

PY - 2016/9/1

Y1 - 2016/9/1

N2 - We examined the temperature-dependent magnetic and structural properties of α-HgI2 in the temperature range of 300-400 K using temperature-dependent DC-magnetization, x-ray diffraction (XRD), and x-ray absorption fine structure (XAFS) measurements. DC-magnetization measurements of α-HgI2 single crystals show a sudden reduction of diamagnetic susceptibility for T > 350 K. XRD measurements with Rietveld refinements reveal a small but substantial amount of decrease in disorder in both Hg and I sites above 350 K, with neither a structural transition nor vacancies in the temperature range. XAFS demonstrates a shift of the I K edge for T > 350 K but no changes at the Hg L3 edge. A stronger bonding of Hg-I pairs above 350 K likely affects the electrons in the outermost shells of iodine atoms and enhances the intrinsic paramagnetic properties, thereby producing a reduction in diamagnetism.

AB - We examined the temperature-dependent magnetic and structural properties of α-HgI2 in the temperature range of 300-400 K using temperature-dependent DC-magnetization, x-ray diffraction (XRD), and x-ray absorption fine structure (XAFS) measurements. DC-magnetization measurements of α-HgI2 single crystals show a sudden reduction of diamagnetic susceptibility for T > 350 K. XRD measurements with Rietveld refinements reveal a small but substantial amount of decrease in disorder in both Hg and I sites above 350 K, with neither a structural transition nor vacancies in the temperature range. XAFS demonstrates a shift of the I K edge for T > 350 K but no changes at the Hg L3 edge. A stronger bonding of Hg-I pairs above 350 K likely affects the electrons in the outermost shells of iodine atoms and enhances the intrinsic paramagnetic properties, thereby producing a reduction in diamagnetism.

KW - Diamagnetic property

KW - HgI

KW - Structure

KW - XAFS

UR - https://www.scopus.com/pages/publications/84975867892

U2 - 10.1016/j.cap.2016.06.008

DO - 10.1016/j.cap.2016.06.008

M3 - Journal article

AN - SCOPUS:84975867892

SN - 1567-1739

VL - 16

SP - 1081

EP - 1087

JO - Current Applied Physics

JF - Current Applied Physics

IS - 9

ER -