Physical and magnetic properties of Ba(Fe1-xMnx) 2As2 single crystals

A. Thaler; H. Hodovanets; M. S. Torikachvili; S. Ran; A. Kracher; W. Straszheim; J. Q. Yan; E. Mun; P. C. Canfield

doi:10.1103/PhysRevB.84.144528

Physical and magnetic properties of Ba(Fe_1-xMn_x) ₂As₂ single crystals

A. Thaler, H. Hodovanets, M. S. Torikachvili, S. Ran, A. Kracher, W. Straszheim, J. Q. Yan, E. Mun, P. C. Canfield

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Abstract

Single crystals of Ba(Fe_1-xMn_x)₂As ₂, 0<x<0.148, have been grown and characterized by structural, magnetic, electrical transport, and thermopower measurements. Although growths of single crystals of Ba(Fe_1-xMn_x)₂As ₂ for the full 0≤x≤1 range were made, we find evidence for phase separation (associated with some form of immiscibility) starting for x>0.1-0.2. Our measurements show that whereas the structural/magnetic phase transition found in pure BaFe₂As₂ at 134 K is initially suppressed by Mn substitution, superconductivity is not observed at any substitution level. Although the effect of hydrostatic pressure up to 20 kbar in the parent BaFe₂As₂ compound is to suppress the structural/magnetic transition at the approximate rate of 0.9 K/kbar, the effects of pressure and Mn substitution in the x=0.102 compound are not cumulative. Phase diagrams of transition temperature versus substitution concentration x based on electrical transport, magnetization, and thermopower measurements have been constructed and compared to those of the Ba(Fe _1-xTM_x)₂As₂ (TM= Co and Cr) series.

Original language	English
Article number	144528
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.84.144528
State	Published - Oct 31 2011
Externally published	Yes

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title = "Physical and magnetic properties of Ba(Fe1-xMnx) 2As2 single crystals",

abstract = "Single crystals of Ba(Fe1-xMnx)2As 2, 01-xMnx)2As 2 for the full 0≤x≤1 range were made, we find evidence for phase separation (associated with some form of immiscibility) starting for x>0.1-0.2. Our measurements show that whereas the structural/magnetic phase transition found in pure BaFe2As2 at 134 K is initially suppressed by Mn substitution, superconductivity is not observed at any substitution level. Although the effect of hydrostatic pressure up to 20 kbar in the parent BaFe2As2 compound is to suppress the structural/magnetic transition at the approximate rate of 0.9 K/kbar, the effects of pressure and Mn substitution in the x=0.102 compound are not cumulative. Phase diagrams of transition temperature versus substitution concentration x based on electrical transport, magnetization, and thermopower measurements have been constructed and compared to those of the Ba(Fe 1-xTMx)2As2 (TM= Co and Cr) series.",

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doi = "10.1103/PhysRevB.84.144528",

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AU - Thaler, A.

AU - Hodovanets, H.

AU - Torikachvili, M. S.

AU - Ran, S.

AU - Kracher, A.

AU - Straszheim, W.

AU - Yan, J. Q.

AU - Mun, E.

AU - Canfield, P. C.

PY - 2011/10/31

Y1 - 2011/10/31

N2 - Single crystals of Ba(Fe1-xMnx)2As 2, 01-xMnx)2As 2 for the full 0≤x≤1 range were made, we find evidence for phase separation (associated with some form of immiscibility) starting for x>0.1-0.2. Our measurements show that whereas the structural/magnetic phase transition found in pure BaFe2As2 at 134 K is initially suppressed by Mn substitution, superconductivity is not observed at any substitution level. Although the effect of hydrostatic pressure up to 20 kbar in the parent BaFe2As2 compound is to suppress the structural/magnetic transition at the approximate rate of 0.9 K/kbar, the effects of pressure and Mn substitution in the x=0.102 compound are not cumulative. Phase diagrams of transition temperature versus substitution concentration x based on electrical transport, magnetization, and thermopower measurements have been constructed and compared to those of the Ba(Fe 1-xTMx)2As2 (TM= Co and Cr) series.

AB - Single crystals of Ba(Fe1-xMnx)2As 2, 01-xMnx)2As 2 for the full 0≤x≤1 range were made, we find evidence for phase separation (associated with some form of immiscibility) starting for x>0.1-0.2. Our measurements show that whereas the structural/magnetic phase transition found in pure BaFe2As2 at 134 K is initially suppressed by Mn substitution, superconductivity is not observed at any substitution level. Although the effect of hydrostatic pressure up to 20 kbar in the parent BaFe2As2 compound is to suppress the structural/magnetic transition at the approximate rate of 0.9 K/kbar, the effects of pressure and Mn substitution in the x=0.102 compound are not cumulative. Phase diagrams of transition temperature versus substitution concentration x based on electrical transport, magnetization, and thermopower measurements have been constructed and compared to those of the Ba(Fe 1-xTMx)2As2 (TM= Co and Cr) series.

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ER -

Physical and magnetic properties of Ba(Fe_1-xMn_x) ₂As₂ single crystals

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