Mixed valency in Yb7Co4InGe12: A novel intermetallic compound stabilized in liquid indium

Maria Chondroudi; Mahalingam Balasubramanian; Ulrich Welp; Wai K. Kwok; Mercouri G. Kanatzidis

doi:10.1021/cm071687q

Mixed valency in Yb₇Co₄InGe₁₂: A novel intermetallic compound stabilized in liquid indium

Maria Chondroudi
, Mahalingam Balasubramanian
, Ulrich Welp
, Wai K. Kwok
, Mercouri G. Kanatzidis

Emerging and Solid-State Batteries

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

43 Scopus citations

Abstract

The quaternary compounds RE₇Co₄InGd₁₂ (RE = Dy, Ho, Yb) were obtained from In flux reactions as thin silver needles. RE₇Co₄InGe₁₂ crystallizes in the tetragonal P4/m space group under a new structure type which is characterized by columnar units forming three different types of channels with the RE atoms situated within these channels. Investigation of the Yb analog with magnetic susceptibility measurements, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge spectroscopy (XANES) revealed that Yb₇Co ₄InGe₁₂ is a mixed-valence compound and that the relative Yb³⁺/Yb²⁺ ratio is slightly temperature-dependent. Additionally, resistivity measurements for Yb₇Co₄InGe ₁₂ exhibited negative magnetoresistance at low temperatures.

Original language	English
Pages (from-to)	4769-4775
Number of pages	7
Journal	Chemistry of Materials
Volume	19
Issue number	19
DOIs	https://doi.org/10.1021/cm071687q
State	Published - Sep 18 2007

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title = "Mixed valency in Yb7Co4InGe12: A novel intermetallic compound stabilized in liquid indium",

abstract = "The quaternary compounds RE7Co4InGd12 (RE = Dy, Ho, Yb) were obtained from In flux reactions as thin silver needles. RE7Co4InGe12 crystallizes in the tetragonal P4/m space group under a new structure type which is characterized by columnar units forming three different types of channels with the RE atoms situated within these channels. Investigation of the Yb analog with magnetic susceptibility measurements, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge spectroscopy (XANES) revealed that Yb7Co 4InGe12 is a mixed-valence compound and that the relative Yb3+/Yb2+ ratio is slightly temperature-dependent. Additionally, resistivity measurements for Yb7Co4InGe 12 exhibited negative magnetoresistance at low temperatures.",

author = "Maria Chondroudi and Mahalingam Balasubramanian and Ulrich Welp and Kwok, \{Wai K.\} and Kanatzidis, \{Mercouri G.\}",

year = "2007",

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doi = "10.1021/cm071687q",

language = "English",

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TY - JOUR

T1 - Mixed valency in Yb7Co4InGe12

T2 - A novel intermetallic compound stabilized in liquid indium

AU - Chondroudi, Maria

AU - Balasubramanian, Mahalingam

AU - Welp, Ulrich

AU - Kwok, Wai K.

AU - Kanatzidis, Mercouri G.

PY - 2007/9/18

Y1 - 2007/9/18

N2 - The quaternary compounds RE7Co4InGd12 (RE = Dy, Ho, Yb) were obtained from In flux reactions as thin silver needles. RE7Co4InGe12 crystallizes in the tetragonal P4/m space group under a new structure type which is characterized by columnar units forming three different types of channels with the RE atoms situated within these channels. Investigation of the Yb analog with magnetic susceptibility measurements, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge spectroscopy (XANES) revealed that Yb7Co 4InGe12 is a mixed-valence compound and that the relative Yb3+/Yb2+ ratio is slightly temperature-dependent. Additionally, resistivity measurements for Yb7Co4InGe 12 exhibited negative magnetoresistance at low temperatures.

AB - The quaternary compounds RE7Co4InGd12 (RE = Dy, Ho, Yb) were obtained from In flux reactions as thin silver needles. RE7Co4InGe12 crystallizes in the tetragonal P4/m space group under a new structure type which is characterized by columnar units forming three different types of channels with the RE atoms situated within these channels. Investigation of the Yb analog with magnetic susceptibility measurements, X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge spectroscopy (XANES) revealed that Yb7Co 4InGe12 is a mixed-valence compound and that the relative Yb3+/Yb2+ ratio is slightly temperature-dependent. Additionally, resistivity measurements for Yb7Co4InGe 12 exhibited negative magnetoresistance at low temperatures.

UR - https://www.scopus.com/pages/publications/34948886270

U2 - 10.1021/cm071687q

DO - 10.1021/cm071687q

M3 - Article

AN - SCOPUS:34948886270

SN - 0897-4756

VL - 19

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JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 19

ER -

Mixed valency in Yb₇Co₄InGe₁₂: A novel intermetallic compound stabilized in liquid indium

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