New germanide superconductors with the type-I clathrate type structure

T. Ipponjima; K. Kawashima; S. Miyazaki; D. Hyakumura; M. Yoshikawa; J. Akimitsu

doi:10.1016/j.physc.2013.03.053

New germanide superconductors with the type-I clathrate type structure

T. Ipponjima, K. Kawashima, S. Miyazaki, D. Hyakumura, M. Yoshikawa, J. Akimitsu

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

1 Citation (Scopus)

Abstract

We discovered that the new germanide superconductors of A ₈(Al,Ge)₄₆ (A = Rb, Cs). A₈(Al,Ge)₄₆ have the type-I clathrate type structure (cubic, space group: Pm3̄n (No. 223)). The superconducting transition temperature is confirmed at around 3.6 K for Rb₈(Al_0.4Ge_0.6)₄₆ and 4 K for Cs₈(Al_0.4Ge_0.6)₄₆, respectively. The lattice constants of these compounds are estimated to be a = 1.082(6) nm for Rb₈(Al_0.4Ge_0.6)₄₆ and a = 1.087(8) nm for Cs₈(Al_0.4Ge_0.6)₄₆. The M-H curve at 1.8 K shows that the Rb₈(Al_0.4Ge _0.6)₄₆ is categorized to be a conventional type-II superconductor. The superconducting parameters of Rb₈(Al _0.4Ge_0.6)₄₆ are determined using the thermodynamic data and Ginzburg-Landau relations.

Original language	English
Pages (from-to)	74-76
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	494
DOIs	https://doi.org/10.1016/j.physc.2013.03.053
Publication status	Published - 2013
Externally published	Yes

Keywords

Germanide
Superconductivity
Type-I clathrate type structure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "New germanide superconductors with the type-I clathrate type structure",

abstract = "We discovered that the new germanide superconductors of A 8(Al,Ge)46 (A = Rb, Cs). A8(Al,Ge)46 have the type-I clathrate type structure (cubic, space group: Pm{\=3}n (No. 223)). The superconducting transition temperature is confirmed at around 3.6 K for Rb8(Al0.4Ge0.6)46 and 4 K for Cs8(Al0.4Ge0.6)46, respectively. The lattice constants of these compounds are estimated to be a = 1.082(6) nm for Rb8(Al0.4Ge0.6)46 and a = 1.087(8) nm for Cs8(Al0.4Ge0.6)46. The M-H curve at 1.8 K shows that the Rb8(Al0.4Ge 0.6)46 is categorized to be a conventional type-II superconductor. The superconducting parameters of Rb8(Al 0.4Ge0.6)46 are determined using the thermodynamic data and Ginzburg-Landau relations.",

keywords = "Germanide, Superconductivity, Type-I clathrate type structure",

author = "T. Ipponjima and K. Kawashima and S. Miyazaki and D. Hyakumura and M. Yoshikawa and J. Akimitsu",

year = "2013",

doi = "10.1016/j.physc.2013.03.053",

language = "English",

volume = "494",

pages = "74--76",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier",

}

TY - JOUR

T1 - New germanide superconductors with the type-I clathrate type structure

AU - Ipponjima, T.

AU - Kawashima, K.

AU - Miyazaki, S.

AU - Hyakumura, D.

AU - Yoshikawa, M.

AU - Akimitsu, J.

PY - 2013

Y1 - 2013

N2 - We discovered that the new germanide superconductors of A 8(Al,Ge)46 (A = Rb, Cs). A8(Al,Ge)46 have the type-I clathrate type structure (cubic, space group: Pm3̄n (No. 223)). The superconducting transition temperature is confirmed at around 3.6 K for Rb8(Al0.4Ge0.6)46 and 4 K for Cs8(Al0.4Ge0.6)46, respectively. The lattice constants of these compounds are estimated to be a = 1.082(6) nm for Rb8(Al0.4Ge0.6)46 and a = 1.087(8) nm for Cs8(Al0.4Ge0.6)46. The M-H curve at 1.8 K shows that the Rb8(Al0.4Ge 0.6)46 is categorized to be a conventional type-II superconductor. The superconducting parameters of Rb8(Al 0.4Ge0.6)46 are determined using the thermodynamic data and Ginzburg-Landau relations.

AB - We discovered that the new germanide superconductors of A 8(Al,Ge)46 (A = Rb, Cs). A8(Al,Ge)46 have the type-I clathrate type structure (cubic, space group: Pm3̄n (No. 223)). The superconducting transition temperature is confirmed at around 3.6 K for Rb8(Al0.4Ge0.6)46 and 4 K for Cs8(Al0.4Ge0.6)46, respectively. The lattice constants of these compounds are estimated to be a = 1.082(6) nm for Rb8(Al0.4Ge0.6)46 and a = 1.087(8) nm for Cs8(Al0.4Ge0.6)46. The M-H curve at 1.8 K shows that the Rb8(Al0.4Ge 0.6)46 is categorized to be a conventional type-II superconductor. The superconducting parameters of Rb8(Al 0.4Ge0.6)46 are determined using the thermodynamic data and Ginzburg-Landau relations.

KW - Germanide

KW - Superconductivity

KW - Type-I clathrate type structure

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U2 - 10.1016/j.physc.2013.03.053

DO - 10.1016/j.physc.2013.03.053

M3 - Article

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SN - 0921-4534

VL - 494

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EP - 76

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

ER -

New germanide superconductors with the type-I clathrate type structure

Abstract

Keywords

ASJC Scopus subject areas

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