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

Autor:	Frank Steglich, Philipp Gegenwart, Tomasz Cichorek, Hayuyoshi Aoki, Michael Lang, Akira Ochiai
Rok vydání:	2002
Předmět:	Charge ordering Materials science Spin glass Specific heat Condensed matter physics Antiferromagnetism Thermodynamics ddc:530 Charge (physics) Electrical and Electronic Engineering Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field
Zdroj:	Physica B: Condensed Matter. :370-372
ISSN:	0921-4526
DOI:	10.1016/s0921-4526(01)01125-5
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdfdda17b3f7fc7e2555a31a982aa114 https://doi.org/10.1016/s0921-4526(01)01125-5 Zobrazit plný text záznamu Full Text from ScienceDirect