Magnetic ordering in frustrated Ce5Ni2Si3 -: art. no. 224409

被引：17

作者：

Lee, BK

Ryu, DH

Kim, DY

Hong, JB

Jung, MH

Kitazawa, H

Suzuki, O

Kimura, S

Kwon, YS ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Phys Res Div BK21, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea

[3] Korea Basic Sci Inst, Mat Sci Team, Taejon 305333, South Korea

[4] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[5] Inst Mol Sci, UVSOR Facil, Okazaki, Aichi 4448585, Japan

[6] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.70.224409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The transport, magnetic, and thermal properties are studied on an antiferromagnetic compound Ce5Ni2Si3 with T-N=7.3 K. We find signatures of spin fluctuation in this geometrically frustrated magnet. The Curie-Weiss fit gives a large value of the paramagnetic Curie temperature, yielding a frustration parameter f=8.4. The electronic specific heat coefficient gamma=300 mJ/Ce mol K-2 is strongly enhanced, leading to residual entropy at low temperatures. The spin fluctuation is suppressed as the magnetic field exceeds the metamagnetic transition field H-m=1 T, where the magnetoresistance decreases steeply. The steady increase of magnetic susceptibility below T-N is likely to be associated with the presence of paramagnetic Ce ions. For La5Ni2Si3, a superconducting transition is observed at T-c=1.8 K.

引用

页码：224409 / 1

页数：5

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