Single-crystal growth and magnetic properties of quasi one-dimensional compounds CeFe2Ga8 and SmFe2Ga8

被引：0

作者：

Deng, X. T. ^{[1
,2
,3
]}

Yan, D. Y. ^{[1
,2
,5
]}

Wang, C. X. ^{[1
,2
]}

Zhang, C. W. ^{[1
,2
,3
]}

Li, Y. ^{[1
,2
]}

Feng, Hai L. ^{[1
,2
,4
]}

Shi, Y. G. ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100190, Peoples R China

[4] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[5] Weiqiao UCAS Sci & Technol Pk, Binzhou Inst Technol, Binzhou 256606, Shandong, Peoples R China

来源：

PHYSICAL REVIEW MATERIALS | 2024年 / 8卷 / 10期

基金：

中国国家自然科学基金;

关键词：

UNCONVENTIONAL SUPERCONDUCTIVITY; KONDO-LATTICE; FERMION; RESISTIVITY; BEHAVIOR; CECOIN5; STATE; HEAT;

D O I：

10.1103/PhysRevMaterials.8.104401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

LnM(2)T(8)-family materials have been proposed to be heavy-fermion systems with quasi-one-dimensional structures. We synthesized single crystals of CeFe2Ga8 and SmFe2Ga8 and systematically investigated their structural and magnetic properties. Both CeFe2Ga8 and SmFe2Ga8 exhibit an incoherent Kondo interaction between the localized 4f electrons and the conduction electrons at elevated temperatures. A short-range magnetic interaction of Fe ions was detected at low temperatures in magnetic measurements in CeFe2Ga8, while the Ce ions were found to be non-magnetic, which is a character of intermediate valence behavior. For SmFe2Ga8, magnetic and specific-heat measurements indicated an antiferromagneticlike phase transition occurring around 10 K, which is insensitive to magnetic fields. More analysis indicated that the antiferromagneticlike transition originates from the interaction of Sm3+ ions. Additionally, the large value of the Sommerfeld coefficient for SmFe2Ga8 suggests a heavy-fermion behavior in this compound. Our study of these two compounds provides insights into the ground state and magnetic structure of this series of heavy-fermion materials.

引用

页数：10