Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors

B. Qian; J. Lee; J. Hu; G. C. Wang; P. Kumar; M. H. Fang; T. J. Liu; D. Fobes; H. Pham; L. Spinu; X. S. Wu; M. Green; S. H. Lee; Z. Q. Mao

doi:10.1103/PhysRevB.85.144427

Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors

B. Qian, J. Lee, J. Hu, G. C. Wang, P. Kumar, M. H. Fang, T. J. Liu, D. Fobes, H. Pham, L. Spinu, X. S. Wu, M. Green, S. H. Lee, Z. Q. Mao

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Abstract

We have synthesized a new layered iron-pnictide CuFeSb. This material shares a similar layered tetragonal structure with iron-based superconductors, with Fe square planar sheets forming from the edge-sharing iron antimony tetrahedral network. CuFeSb differs remarkably from Fe-based superconductors in the height of anion Z _anion from the Fe plane; Z _Sb for CuFeSb is ∼1.84 Å, much larger than Z _As (1.31-1.51 Å) in FeAs compounds and Z _Te (∼1.77 Å) in Fe _1+yTe. In contrast with the metallic antiferromagnetic (AFM) or superconducting state of iron pnictides and chalcogenides under current studies, CuFeSb exhibits a metallic, ferromagnetic (FM) state with T _c=375 K. This finding suggests that the competition between AFM and FM coupling may exist in Fe-based superconductors and that the nature of magnetic coupling within the Fe plane is indeed dependent on the height of anion as predicted in theories.

Original language	English (US)
Article number	144427
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.85.144427
State	Published - Apr 26 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.85.144427

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Qian, B., Lee, J., Hu, J., Wang, G. C., Kumar, P., Fang, M. H., Liu, T. J., Fobes, D., Pham, H., Spinu, L., Wu, X. S., Green, M., Lee, S. H., & Mao, Z. Q. (2012). Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors. Physical Review B - Condensed Matter and Materials Physics, 85(14), Article 144427. https://doi.org/10.1103/PhysRevB.85.144427

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title = "Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors",

abstract = "We have synthesized a new layered iron-pnictide CuFeSb. This material shares a similar layered tetragonal structure with iron-based superconductors, with Fe square planar sheets forming from the edge-sharing iron antimony tetrahedral network. CuFeSb differs remarkably from Fe-based superconductors in the height of anion Z anion from the Fe plane; Z Sb for CuFeSb is ∼1.84 {\AA}, much larger than Z As (1.31-1.51 {\AA}) in FeAs compounds and Z Te (∼1.77 {\AA}) in Fe 1+yTe. In contrast with the metallic antiferromagnetic (AFM) or superconducting state of iron pnictides and chalcogenides under current studies, CuFeSb exhibits a metallic, ferromagnetic (FM) state with T c=375 K. This finding suggests that the competition between AFM and FM coupling may exist in Fe-based superconductors and that the nature of magnetic coupling within the Fe plane is indeed dependent on the height of anion as predicted in theories.",

author = "B. Qian and J. Lee and J. Hu and Wang, {G. C.} and P. Kumar and Fang, {M. H.} and Liu, {T. J.} and D. Fobes and H. Pham and L. Spinu and Wu, {X. S.} and M. Green and Lee, {S. H.} and Mao, {Z. Q.}",

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doi = "10.1103/PhysRevB.85.144427",

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T2 - Evidence of competing magnetic interactions in iron-based superconductors

AU - Qian, B.

AU - Lee, J.

AU - Hu, J.

AU - Wang, G. C.

AU - Kumar, P.

AU - Fang, M. H.

AU - Liu, T. J.

AU - Fobes, D.

AU - Pham, H.

AU - Spinu, L.

AU - Wu, X. S.

AU - Green, M.

AU - Lee, S. H.

AU - Mao, Z. Q.

PY - 2012/4/26

Y1 - 2012/4/26

N2 - We have synthesized a new layered iron-pnictide CuFeSb. This material shares a similar layered tetragonal structure with iron-based superconductors, with Fe square planar sheets forming from the edge-sharing iron antimony tetrahedral network. CuFeSb differs remarkably from Fe-based superconductors in the height of anion Z anion from the Fe plane; Z Sb for CuFeSb is ∼1.84 Å, much larger than Z As (1.31-1.51 Å) in FeAs compounds and Z Te (∼1.77 Å) in Fe 1+yTe. In contrast with the metallic antiferromagnetic (AFM) or superconducting state of iron pnictides and chalcogenides under current studies, CuFeSb exhibits a metallic, ferromagnetic (FM) state with T c=375 K. This finding suggests that the competition between AFM and FM coupling may exist in Fe-based superconductors and that the nature of magnetic coupling within the Fe plane is indeed dependent on the height of anion as predicted in theories.

AB - We have synthesized a new layered iron-pnictide CuFeSb. This material shares a similar layered tetragonal structure with iron-based superconductors, with Fe square planar sheets forming from the edge-sharing iron antimony tetrahedral network. CuFeSb differs remarkably from Fe-based superconductors in the height of anion Z anion from the Fe plane; Z Sb for CuFeSb is ∼1.84 Å, much larger than Z As (1.31-1.51 Å) in FeAs compounds and Z Te (∼1.77 Å) in Fe 1+yTe. In contrast with the metallic antiferromagnetic (AFM) or superconducting state of iron pnictides and chalcogenides under current studies, CuFeSb exhibits a metallic, ferromagnetic (FM) state with T c=375 K. This finding suggests that the competition between AFM and FM coupling may exist in Fe-based superconductors and that the nature of magnetic coupling within the Fe plane is indeed dependent on the height of anion as predicted in theories.

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Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors

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