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

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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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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.}",

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year = "2015",

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

language = "English (US)",

volume = "27",

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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.

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DO - 10.1021/acs.chemmater.5b03091

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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

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