Anisotropic behavior in resistivity of RAgSb2 ( R=Ce, La )

Y. Watanabe; Y. Inada; H. Hidaka; H. Kotegawa; T. C. Kobayashi; T. D. Matsuda; D. Aoki

doi:10.1016/j.physb.2006.01.305

Anisotropic behavior in resistivity of RAgSb₂ ( R=Ce, La )

Y. Watanabe, Y. Inada, H. Hidaka, H. Kotegawa, T. C. Kobayashi, T. D. Matsuda, D. Aoki

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

3 Citations (Scopus)

Abstract

CeAgSb₂ crystallizes in the tetragonal ZrCuSi₂ type structure (P4/nmm), which consists of Sb-Ce, Sb-Ag-Ce, Sb-Sb layers. It shows the peculiar anisotropic ferromagnetic ordering below 9.7 K with a small ordered moment of 0.33 μ_B. Its residual resistivity steeply increases above p_c ≅ 3.3 GPa where the magnetic order disappears. It is expected that the p-f mixing on the peculiar hollow square pillar-like Fermi surface plays an important role in CeAgSb₂, while similar Fermi surfaces were not observed in LaAgSb₂. We have measured the anisotropy in the electrical resistivity of Ce_xLa_1-xAgSb₂ to study the p-f mixing effect. Small humps were observed in the temperature dependence of the resistivity in Ce_xLa_1-xAgSb₂. We expected them the CDW transition. The CDW state coexisted with the ferromagnetic state around x = 0.2.

Original language	English
Pages (from-to)	827-828
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.305
Publication status	Published - May 1 2006

Keywords

CeAgSb
LaAgSb
Singularity of resistivity
p-f mixing

ASJC Scopus subject areas

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

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title = "Anisotropic behavior in resistivity of RAgSb2 ( R=Ce, La )",

abstract = "CeAgSb2 crystallizes in the tetragonal ZrCuSi2 type structure (P4/nmm), which consists of Sb-Ce, Sb-Ag-Ce, Sb-Sb layers. It shows the peculiar anisotropic ferromagnetic ordering below 9.7 K with a small ordered moment of 0.33 μB. Its residual resistivity steeply increases above pc ≅ 3.3 GPa where the magnetic order disappears. It is expected that the p-f mixing on the peculiar hollow square pillar-like Fermi surface plays an important role in CeAgSb2, while similar Fermi surfaces were not observed in LaAgSb2. We have measured the anisotropy in the electrical resistivity of CexLa1-xAgSb2 to study the p-f mixing effect. Small humps were observed in the temperature dependence of the resistivity in CexLa1-xAgSb2. We expected them the CDW transition. The CDW state coexisted with the ferromagnetic state around x = 0.2.",

keywords = "CeAgSb, LaAgSb, Singularity of resistivity, p-f mixing",

author = "Y. Watanabe and Y. Inada and H. Hidaka and H. Kotegawa and Kobayashi, {T. C.} and Matsuda, {T. D.} and D. Aoki",

year = "2006",

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T1 - Anisotropic behavior in resistivity of RAgSb2 ( R=Ce, La )

AU - Watanabe, Y.

AU - Inada, Y.

AU - Hidaka, H.

AU - Kotegawa, H.

AU - Kobayashi, T. C.

AU - Matsuda, T. D.

AU - Aoki, D.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - CeAgSb2 crystallizes in the tetragonal ZrCuSi2 type structure (P4/nmm), which consists of Sb-Ce, Sb-Ag-Ce, Sb-Sb layers. It shows the peculiar anisotropic ferromagnetic ordering below 9.7 K with a small ordered moment of 0.33 μB. Its residual resistivity steeply increases above pc ≅ 3.3 GPa where the magnetic order disappears. It is expected that the p-f mixing on the peculiar hollow square pillar-like Fermi surface plays an important role in CeAgSb2, while similar Fermi surfaces were not observed in LaAgSb2. We have measured the anisotropy in the electrical resistivity of CexLa1-xAgSb2 to study the p-f mixing effect. Small humps were observed in the temperature dependence of the resistivity in CexLa1-xAgSb2. We expected them the CDW transition. The CDW state coexisted with the ferromagnetic state around x = 0.2.

AB - CeAgSb2 crystallizes in the tetragonal ZrCuSi2 type structure (P4/nmm), which consists of Sb-Ce, Sb-Ag-Ce, Sb-Sb layers. It shows the peculiar anisotropic ferromagnetic ordering below 9.7 K with a small ordered moment of 0.33 μB. Its residual resistivity steeply increases above pc ≅ 3.3 GPa where the magnetic order disappears. It is expected that the p-f mixing on the peculiar hollow square pillar-like Fermi surface plays an important role in CeAgSb2, while similar Fermi surfaces were not observed in LaAgSb2. We have measured the anisotropy in the electrical resistivity of CexLa1-xAgSb2 to study the p-f mixing effect. Small humps were observed in the temperature dependence of the resistivity in CexLa1-xAgSb2. We expected them the CDW transition. The CDW state coexisted with the ferromagnetic state around x = 0.2.

KW - CeAgSb

KW - LaAgSb

KW - Singularity of resistivity

KW - p-f mixing

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