Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe2As 2

Yu Song; Scott V. Carr; Xingye Lu; Chenglin Zhang; Zachary C. Sims; N. F. Luttrell; Songxue Chi; Yang Zhao; Jeffrey W. Lynn; Pengcheng Dai

doi:10.1103/PhysRevB.87.184511

Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe₂As ₂

Yu Song, Scott V. Carr, Xingye Lu, Chenglin Zhang, Zachary C. Sims, N. F. Luttrell, Songxue Chi, Yang Zhao, Jeffrey W. Lynn, Pengcheng Dai

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33 Scopus citations

Abstract

We use neutron scattering to study the effect of uniaxial pressure on the tetragonal-to-orthorhombic structural (T_s) and paramagnetic-to- antiferromagnetic (T_N) phase transitions in NaFeAs and compare the outcome with similar measurements on as-grown and annealed BaFe ₂As₂. In previous work on as-grown BaFe₂As ₂, uniaxial pressure necessary to detwin the sample was found to induce a significant increase in zero pressure T_N and T_s. However, we find that similar uniaxial pressure used to detwin NaFeAs and annealed BaFe₂As₂ has a very small effect on their T _N and T_s. Since transport measurements on these samples still reveal resistivity anisotropy above T_N and T_s, we conclude that such anisotropy can not be due to uniaxial strain-induced T _N and T_s shifts, but must arise from intrinsic electronic anisotropy in these materials.

Original language	English
Article number	184511
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	87
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.87.184511
State	Published - May 28 2013

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Song, Y., Carr, S. V., Lu, X., Zhang, C., Sims, Z. C., Luttrell, N. F., Chi, S., Zhao, Y., Lynn, J. W., & Dai, P. (2013). Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe₂As ₂. Physical Review B - Condensed Matter and Materials Physics, 87(18), Article 184511. https://doi.org/10.1103/PhysRevB.87.184511

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title = "Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe2As 2",

abstract = "We use neutron scattering to study the effect of uniaxial pressure on the tetragonal-to-orthorhombic structural (Ts) and paramagnetic-to- antiferromagnetic (TN) phase transitions in NaFeAs and compare the outcome with similar measurements on as-grown and annealed BaFe 2As2. In previous work on as-grown BaFe2As 2, uniaxial pressure necessary to detwin the sample was found to induce a significant increase in zero pressure TN and Ts. However, we find that similar uniaxial pressure used to detwin NaFeAs and annealed BaFe2As2 has a very small effect on their T N and Ts. Since transport measurements on these samples still reveal resistivity anisotropy above TN and Ts, we conclude that such anisotropy can not be due to uniaxial strain-induced T N and Ts shifts, but must arise from intrinsic electronic anisotropy in these materials.",

author = "Yu Song and Carr, {Scott V.} and Xingye Lu and Chenglin Zhang and Sims, {Zachary C.} and Luttrell, {N. F.} and Songxue Chi and Yang Zhao and Lynn, {Jeffrey W.} and Pengcheng Dai",

year = "2013",

month = may,

day = "28",

doi = "10.1103/PhysRevB.87.184511",

language = "English",

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journal = "Physical Review B - Condensed Matter and Materials Physics",

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publisher = "American Physical Society",

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T1 - Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe2As 2

AU - Song, Yu

AU - Carr, Scott V.

AU - Lu, Xingye

AU - Zhang, Chenglin

AU - Sims, Zachary C.

AU - Luttrell, N. F.

AU - Chi, Songxue

AU - Zhao, Yang

AU - Lynn, Jeffrey W.

AU - Dai, Pengcheng

PY - 2013/5/28

Y1 - 2013/5/28

N2 - We use neutron scattering to study the effect of uniaxial pressure on the tetragonal-to-orthorhombic structural (Ts) and paramagnetic-to- antiferromagnetic (TN) phase transitions in NaFeAs and compare the outcome with similar measurements on as-grown and annealed BaFe 2As2. In previous work on as-grown BaFe2As 2, uniaxial pressure necessary to detwin the sample was found to induce a significant increase in zero pressure TN and Ts. However, we find that similar uniaxial pressure used to detwin NaFeAs and annealed BaFe2As2 has a very small effect on their T N and Ts. Since transport measurements on these samples still reveal resistivity anisotropy above TN and Ts, we conclude that such anisotropy can not be due to uniaxial strain-induced T N and Ts shifts, but must arise from intrinsic electronic anisotropy in these materials.

AB - We use neutron scattering to study the effect of uniaxial pressure on the tetragonal-to-orthorhombic structural (Ts) and paramagnetic-to- antiferromagnetic (TN) phase transitions in NaFeAs and compare the outcome with similar measurements on as-grown and annealed BaFe 2As2. In previous work on as-grown BaFe2As 2, uniaxial pressure necessary to detwin the sample was found to induce a significant increase in zero pressure TN and Ts. However, we find that similar uniaxial pressure used to detwin NaFeAs and annealed BaFe2As2 has a very small effect on their T N and Ts. Since transport measurements on these samples still reveal resistivity anisotropy above TN and Ts, we conclude that such anisotropy can not be due to uniaxial strain-induced T N and Ts shifts, but must arise from intrinsic electronic anisotropy in these materials.

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U2 - 10.1103/PhysRevB.87.184511

DO - 10.1103/PhysRevB.87.184511

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SN - 1098-0121

VL - 87

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 18

M1 - 184511

ER -

Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe₂As ₂

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