Boron substitution in ternary metal phosphide superconductors

R. E. Schaak; R. J. Cava

doi:10.1016/j.materresbull.2004.04.011

Boron substitution in ternary metal phosphide superconductors

R. E. Schaak, R. J. Cava

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Abstract

Partial substitution of boron for phosphorus in the ternary phosphide superconductors ZrRuP and LaRu₂P₂ induces highly anisotropic structural changes and suppresses the superconducting transition temperatures. Undoped ZrRuP [hexagonal, a=6.445(4)Å, c=3.765(2)Å] systematically expands for ZrRuP_1-xB_x (x=0.05, 0.10, 0.15, 0.20, 0.40) in the a direction to 6.949(4)Å and shrinks in the c direction to 3.601(3)Å. Superconductivity is still present in the boron-substituted samples, although T_c drops from 10.1K in ZrRuP to 5.6K in ZrRuP_0.6B_0.4. LaRu₂P₂ [tetragonal, a=4.032(2)Å, c=10.632(7)Å] remains essentially unchanged along the a axis [a=4.037(1)Å] upon substitution at a starting composition of LaRu₂P_1.6B_0.4, but shrinks along the c axis to 10.477(5)Å. Accordingly, the superconducting T_c drops from 4.0K for LaRu₂P₂ to 2.0K for LaRu ₂P_1.6B_0.4.

Original language	English (US)
Pages (from-to)	1231-1235
Number of pages	5
Journal	Materials Research Bulletin
Volume	39
Issue number	9
DOIs	https://doi.org/10.1016/j.materresbull.2004.04.011
State	Published - Jul 2 2004

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

A. Intermetallic compounds
A. Superconductors
B. Chemical synthesis
C. X-ray diffraction
D. Magnetic properties

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10.1016/j.materresbull.2004.04.011

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title = "Boron substitution in ternary metal phosphide superconductors",

abstract = "Partial substitution of boron for phosphorus in the ternary phosphide superconductors ZrRuP and LaRu2P2 induces highly anisotropic structural changes and suppresses the superconducting transition temperatures. Undoped ZrRuP [hexagonal, a=6.445(4){\AA}, c=3.765(2){\AA}] systematically expands for ZrRuP1-xBx (x=0.05, 0.10, 0.15, 0.20, 0.40) in the a direction to 6.949(4){\AA} and shrinks in the c direction to 3.601(3){\AA}. Superconductivity is still present in the boron-substituted samples, although Tc drops from 10.1K in ZrRuP to 5.6K in ZrRuP0.6B0.4. LaRu2P2 [tetragonal, a=4.032(2){\AA}, c=10.632(7){\AA}] remains essentially unchanged along the a axis [a=4.037(1){\AA}] upon substitution at a starting composition of LaRu2P1.6B0.4, but shrinks along the c axis to 10.477(5){\AA}. Accordingly, the superconducting Tc drops from 4.0K for LaRu2P2 to 2.0K for LaRu 2P1.6B0.4.",

keywords = "A. Intermetallic compounds, A. Superconductors, B. Chemical synthesis, C. X-ray diffraction, D. Magnetic properties",

author = "Schaak, {R. E.} and Cava, {R. J.}",

note = "Funding Information: This work was supported by the US Department of Energy, grant DE-FG02-98ER45706.",

year = "2004",

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doi = "10.1016/j.materresbull.2004.04.011",

language = "English (US)",

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pages = "1231--1235",

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TY - JOUR

T1 - Boron substitution in ternary metal phosphide superconductors

AU - Schaak, R. E.

AU - Cava, R. J.

N1 - Funding Information: This work was supported by the US Department of Energy, grant DE-FG02-98ER45706.

PY - 2004/7/2

Y1 - 2004/7/2

N2 - Partial substitution of boron for phosphorus in the ternary phosphide superconductors ZrRuP and LaRu2P2 induces highly anisotropic structural changes and suppresses the superconducting transition temperatures. Undoped ZrRuP [hexagonal, a=6.445(4)Å, c=3.765(2)Å] systematically expands for ZrRuP1-xBx (x=0.05, 0.10, 0.15, 0.20, 0.40) in the a direction to 6.949(4)Å and shrinks in the c direction to 3.601(3)Å. Superconductivity is still present in the boron-substituted samples, although Tc drops from 10.1K in ZrRuP to 5.6K in ZrRuP0.6B0.4. LaRu2P2 [tetragonal, a=4.032(2)Å, c=10.632(7)Å] remains essentially unchanged along the a axis [a=4.037(1)Å] upon substitution at a starting composition of LaRu2P1.6B0.4, but shrinks along the c axis to 10.477(5)Å. Accordingly, the superconducting Tc drops from 4.0K for LaRu2P2 to 2.0K for LaRu 2P1.6B0.4.

AB - Partial substitution of boron for phosphorus in the ternary phosphide superconductors ZrRuP and LaRu2P2 induces highly anisotropic structural changes and suppresses the superconducting transition temperatures. Undoped ZrRuP [hexagonal, a=6.445(4)Å, c=3.765(2)Å] systematically expands for ZrRuP1-xBx (x=0.05, 0.10, 0.15, 0.20, 0.40) in the a direction to 6.949(4)Å and shrinks in the c direction to 3.601(3)Å. Superconductivity is still present in the boron-substituted samples, although Tc drops from 10.1K in ZrRuP to 5.6K in ZrRuP0.6B0.4. LaRu2P2 [tetragonal, a=4.032(2)Å, c=10.632(7)Å] remains essentially unchanged along the a axis [a=4.037(1)Å] upon substitution at a starting composition of LaRu2P1.6B0.4, but shrinks along the c axis to 10.477(5)Å. Accordingly, the superconducting Tc drops from 4.0K for LaRu2P2 to 2.0K for LaRu 2P1.6B0.4.

KW - A. Intermetallic compounds

KW - A. Superconductors

KW - B. Chemical synthesis

KW - C. X-ray diffraction

KW - D. Magnetic properties

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U2 - 10.1016/j.materresbull.2004.04.011

DO - 10.1016/j.materresbull.2004.04.011

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SN - 0025-5408

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SP - 1231

EP - 1235

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 9

ER -

Boron substitution in ternary metal phosphide superconductors

Abstract

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