Cr-Doped TiSe2 - A Layered Dichalcogenide Spin Glass

Huixia Luo; Jason W. Krizan; Elizabeth M. Seibel; Weiwei Xie; Girija S. Sahasrabudhe; Susanna L. Bergman; Brendan F. Phelan; Jing Tao; Zhen Wang; Jiandi Zhang; R. J. Cava

doi:10.1021/acs.chemmater.5b03091

Cr-Doped TiSe₂ - A Layered Dichalcogenide Spin Glass

Huixia Luo
, Jason W. Krizan
, Elizabeth M. Seibel
, Weiwei Xie
, Girija S. Sahasrabudhe
, Susanna L. Bergman
, Brendan F. Phelan
, Jing Tao
, Zhen Wang
, Jiandi Zhang
, R. J. Cava

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We report the magnetic characterization of the Cr-doped layered dichalcogenide TiSe₂. The temperature dependent magnetic susceptibilities are typical of those seen in geometrically frustrated insulating antiferromagnets. The Cr moment is close to the spin-only value, and the Curie-Weiss temperatures (θ_cw) are between -90 and -230 K. Freezing of the spin system, which is glassy, characterized by peaks in the ac and dc susceptibility and specific heat, does not occur until below T/θ_cw = 0.05. The CDW transition seen in the resistivity for pure TiSe₂ is still present for 3% Cr substitution but is absent by 10% substitution, above which the materials are metallic and p-type. Structural refinements, magnetic characterization, and chemical considerations indicate that the materials are of the type Ti_1-xCr_xSe_2-x/2 for 0 ≤ x ≤ 0.6.

Original language	English (US)
Pages (from-to)	6810-6817
Number of pages	8
Journal	Chemistry of Materials
Volume	27
Issue number	19
DOIs	https://doi.org/10.1021/acs.chemmater.5b03091
State	Published - Sep 17 2015

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/acs.chemmater.5b03091

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title = "Cr-Doped TiSe2 - A Layered Dichalcogenide Spin Glass",

abstract = "We report the magnetic characterization of the Cr-doped layered dichalcogenide TiSe2. The temperature dependent magnetic susceptibilities are typical of those seen in geometrically frustrated insulating antiferromagnets. The Cr moment is close to the spin-only value, and the Curie-Weiss temperatures (θcw) are between -90 and -230 K. Freezing of the spin system, which is glassy, characterized by peaks in the ac and dc susceptibility and specific heat, does not occur until below T/θcw = 0.05. The CDW transition seen in the resistivity for pure TiSe2 is still present for 3\% Cr substitution but is absent by 10\% substitution, above which the materials are metallic and p-type. Structural refinements, magnetic characterization, and chemical considerations indicate that the materials are of the type Ti1-xCrxSe2-x/2 for 0 ≤ x ≤ 0.6.",

author = "Huixia Luo and Krizan, \{Jason W.\} and Seibel, \{Elizabeth M.\} and Weiwei Xie and Sahasrabudhe, \{Girija S.\} and Bergman, \{Susanna L.\} and Phelan, \{Brendan F.\} and Jing Tao and Zhen Wang and Jiandi Zhang and Cava, \{R. J.\}",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = sep,

day = "17",

doi = "10.1021/acs.chemmater.5b03091",

language = "English (US)",

volume = "27",

pages = "6810--6817",

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TY - JOUR

T1 - Cr-Doped TiSe2 - A Layered Dichalcogenide Spin Glass

AU - Luo, Huixia

AU - Krizan, Jason W.

AU - Seibel, Elizabeth M.

AU - Xie, Weiwei

AU - Sahasrabudhe, Girija S.

AU - Bergman, Susanna L.

AU - Phelan, Brendan F.

AU - Tao, Jing

AU - Wang, Zhen

AU - Zhang, Jiandi

AU - Cava, R. J.

PY - 2015/9/17

Y1 - 2015/9/17

N2 - We report the magnetic characterization of the Cr-doped layered dichalcogenide TiSe2. The temperature dependent magnetic susceptibilities are typical of those seen in geometrically frustrated insulating antiferromagnets. The Cr moment is close to the spin-only value, and the Curie-Weiss temperatures (θcw) are between -90 and -230 K. Freezing of the spin system, which is glassy, characterized by peaks in the ac and dc susceptibility and specific heat, does not occur until below T/θcw = 0.05. The CDW transition seen in the resistivity for pure TiSe2 is still present for 3% Cr substitution but is absent by 10% substitution, above which the materials are metallic and p-type. Structural refinements, magnetic characterization, and chemical considerations indicate that the materials are of the type Ti1-xCrxSe2-x/2 for 0 ≤ x ≤ 0.6.

AB - We report the magnetic characterization of the Cr-doped layered dichalcogenide TiSe2. The temperature dependent magnetic susceptibilities are typical of those seen in geometrically frustrated insulating antiferromagnets. The Cr moment is close to the spin-only value, and the Curie-Weiss temperatures (θcw) are between -90 and -230 K. Freezing of the spin system, which is glassy, characterized by peaks in the ac and dc susceptibility and specific heat, does not occur until below T/θcw = 0.05. The CDW transition seen in the resistivity for pure TiSe2 is still present for 3% Cr substitution but is absent by 10% substitution, above which the materials are metallic and p-type. Structural refinements, magnetic characterization, and chemical considerations indicate that the materials are of the type Ti1-xCrxSe2-x/2 for 0 ≤ x ≤ 0.6.

UR - https://www.scopus.com/pages/publications/84944096547

UR - https://www.scopus.com/pages/publications/84944096547#tab=citedBy

U2 - 10.1021/acs.chemmater.5b03091

DO - 10.1021/acs.chemmater.5b03091

M3 - Article

AN - SCOPUS:84944096547

SN - 0897-4756

VL - 27

SP - 6810

EP - 6817

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 19

ER -

Cr-Doped TiSe₂ - A Layered Dichalcogenide Spin Glass

Abstract

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