Magnetic ordering in frustrated Ce5Ni2Si3

B. K. Lee; D. H. Ryu; D. Y. Kim; J. B. Hong; M. H. Jung; H. Kitazawa; O. Suzuki; S. Kimura; Y. S. Kwon

doi:10.1103/PhysRevB.70.224409

Magnetic ordering in frustrated Ce₅Ni₂Si₃

B. K. Lee, D. H. Ryu, D. Y. Kim, J. B. Hong, M. H. Jung, H. Kitazawa, O. Suzuki, S. Kimura, Y. S. Kwon

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

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 γ=300 mJ/Ce mol K² 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 La ₅Ni₂Si₃, a superconducting transition is observed at T_c=1.8 K.

Original language	English
Article number	224409
Pages (from-to)	224409-1-224409-5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.70.224409
State	Published - Dec 2004

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Funding Information:
PRBMDO 0163-1829 10.1103/PhysRevB.67.144408 67 , 144408 ( 2003 ). This work supported by the Korea Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University and by Grant No. R01-2003-000-10095-0 from the Basic Research Program of the Korea Science and Engineering Foundation.

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title = "Magnetic ordering in frustrated Ce5Ni2Si3",

abstract = "The transport, magnetic, and thermal properties are studied on an antiferromagnetic compound Ce5Ni2Si3 with TN=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 γ=300 mJ/Ce mol K2 is strongly enhanced, leading to residual entropy at low temperatures. The spin fluctuation is suppressed as the magnetic field exceeds the metamagnetic transition field Hm=1 T, where the magnetoresistance decreases steeply. The steady increase of magnetic susceptibility below TN is likely to be associated with the presence of paramagnetic Ce ions. For La 5Ni2Si3, a superconducting transition is observed at Tc=1.8 K.",

author = "Lee, {B. K.} and Ryu, {D. H.} and Kim, {D. Y.} and Hong, {J. B.} and Jung, {M. H.} and H. Kitazawa and O. Suzuki and S. Kimura and Kwon, {Y. S.}",

note = "Funding Information: PRBMDO 0163-1829 10.1103/PhysRevB.67.144408 67 , 144408 ( 2003 ). This work supported by the Korea Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University and by Grant No. R01-2003-000-10095-0 from the Basic Research Program of the Korea Science and Engineering Foundation. ",

year = "2004",

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doi = "10.1103/PhysRevB.70.224409",

language = "English",

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T1 - Magnetic ordering in frustrated Ce5Ni2Si3

AU - Lee, B. K.

AU - Ryu, D. H.

AU - Kim, D. Y.

AU - Hong, J. B.

AU - Jung, M. H.

AU - Kitazawa, H.

AU - Suzuki, O.

AU - Kimura, S.

AU - Kwon, Y. S.

N1 - Funding Information: PRBMDO 0163-1829 10.1103/PhysRevB.67.144408 67 , 144408 ( 2003 ). This work supported by the Korea Science and Engineering Foundation through the Center for Strongly Correlated Materials Research (CSCMR) at Seoul National University and by Grant No. R01-2003-000-10095-0 from the Basic Research Program of the Korea Science and Engineering Foundation.

PY - 2004/12

Y1 - 2004/12

N2 - The transport, magnetic, and thermal properties are studied on an antiferromagnetic compound Ce5Ni2Si3 with TN=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 γ=300 mJ/Ce mol K2 is strongly enhanced, leading to residual entropy at low temperatures. The spin fluctuation is suppressed as the magnetic field exceeds the metamagnetic transition field Hm=1 T, where the magnetoresistance decreases steeply. The steady increase of magnetic susceptibility below TN is likely to be associated with the presence of paramagnetic Ce ions. For La 5Ni2Si3, a superconducting transition is observed at Tc=1.8 K.

AB - The transport, magnetic, and thermal properties are studied on an antiferromagnetic compound Ce5Ni2Si3 with TN=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 γ=300 mJ/Ce mol K2 is strongly enhanced, leading to residual entropy at low temperatures. The spin fluctuation is suppressed as the magnetic field exceeds the metamagnetic transition field Hm=1 T, where the magnetoresistance decreases steeply. The steady increase of magnetic susceptibility below TN is likely to be associated with the presence of paramagnetic Ce ions. For La 5Ni2Si3, a superconducting transition is observed at Tc=1.8 K.

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ER -

Magnetic ordering in frustrated Ce₅Ni₂Si₃

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