Low-temperature specific heat of non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3

T. Cichorek; Hayuyoshi Aoki; P. Gegenwart; M. Lang; A. Ochiai; F. Steglich

doi:10.1016/S0921-4526(01)01125-5

Low-temperature specific heat of non-charge ordered Yb₄(As_0.36Sb_0.64)₃ and (Yb_0.87Lu_0.13)₄As₃

T. Cichorek, Hayuyoshi Aoki, P. Gegenwart, M. Lang, A. Ochiai, F. Steglich

SCI - Physics

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

2 Citations (Scopus)

Abstract

Most of the unusual low-T properties of Yb₄As₃, including a large specific-heat coefficient C(T)/T ≃ 200 mJ/K²mol, result from the one-dimensional S = 1/2 antiferromagnetism caused by the formation of Yb³⁺ chains below the charge-ordering transition. On the other hand, large C(T)/T values for non-charge ordered Yb₄(As_0.36Sb_0.64)₃ and (Yb_0.87Lu_0.13)₄As₃ have also been reported. In order to clarify similarities and differences in the low-T specific heat between the 64% Sb- and 13% Lu-doped systems and pure Yb₄As₃, measurements down to 0.06 K in magnetic fields up to 10 T have been performed. The experiments reveal spin-glass freezing around 0.1 and 0.4 K for Yb₄(As_0.36Sb_0.64)₃ and (Yb_0.87Lu_0.13)₄As₃, respectively, that also affects their thermodynamic properties at higher temperatures.

Original language	English
Pages (from-to)	370-372
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01125-5
Publication status	Published - 2002 Mar 1
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: 2002 Aug 6 → 2002 Aug 6

Keywords

Specific heat
Spin glass
YbAs

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(01)01125-5

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@article{c83fddd5c7e04ebb90682fdce3638108,

title = "Low-temperature specific heat of non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3",

abstract = "Most of the unusual low-T properties of Yb4As3, including a large specific-heat coefficient C(T)/T ≃ 200 mJ/K2mol, result from the one-dimensional S = 1/2 antiferromagnetism caused by the formation of Yb3+ chains below the charge-ordering transition. On the other hand, large C(T)/T values for non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3 have also been reported. In order to clarify similarities and differences in the low-T specific heat between the 64% Sb- and 13% Lu-doped systems and pure Yb4As3, measurements down to 0.06 K in magnetic fields up to 10 T have been performed. The experiments reveal spin-glass freezing around 0.1 and 0.4 K for Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3, respectively, that also affects their thermodynamic properties at higher temperatures.",

keywords = "Specific heat, Spin glass, YbAs",

author = "T. Cichorek and Hayuyoshi Aoki and P. Gegenwart and M. Lang and A. Ochiai and F. Steglich",

year = "2002",

month = mar,

day = "1",

doi = "10.1016/S0921-4526(01)01125-5",

language = "English",

volume = "312-313",

pages = "370--372",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

note = "International Conference on Strongly Correlated Electrons ; Conference date: 06-08-2002 Through 06-08-2002",

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TY - JOUR

T1 - Low-temperature specific heat of non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3

AU - Cichorek, T.

AU - Aoki, Hayuyoshi

AU - Gegenwart, P.

AU - Lang, M.

AU - Ochiai, A.

AU - Steglich, F.

PY - 2002/3/1

Y1 - 2002/3/1

N2 - Most of the unusual low-T properties of Yb4As3, including a large specific-heat coefficient C(T)/T ≃ 200 mJ/K2mol, result from the one-dimensional S = 1/2 antiferromagnetism caused by the formation of Yb3+ chains below the charge-ordering transition. On the other hand, large C(T)/T values for non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3 have also been reported. In order to clarify similarities and differences in the low-T specific heat between the 64% Sb- and 13% Lu-doped systems and pure Yb4As3, measurements down to 0.06 K in magnetic fields up to 10 T have been performed. The experiments reveal spin-glass freezing around 0.1 and 0.4 K for Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3, respectively, that also affects their thermodynamic properties at higher temperatures.

AB - Most of the unusual low-T properties of Yb4As3, including a large specific-heat coefficient C(T)/T ≃ 200 mJ/K2mol, result from the one-dimensional S = 1/2 antiferromagnetism caused by the formation of Yb3+ chains below the charge-ordering transition. On the other hand, large C(T)/T values for non-charge ordered Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3 have also been reported. In order to clarify similarities and differences in the low-T specific heat between the 64% Sb- and 13% Lu-doped systems and pure Yb4As3, measurements down to 0.06 K in magnetic fields up to 10 T have been performed. The experiments reveal spin-glass freezing around 0.1 and 0.4 K for Yb4(As0.36Sb0.64)3 and (Yb0.87Lu0.13)4As3, respectively, that also affects their thermodynamic properties at higher temperatures.

KW - Specific heat

KW - Spin glass

KW - YbAs

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EP - 372

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