Weak ferromagnetism of Cux Fe1+yAs and its evolution with Co doping

Bin Qian, Jin Hu, Jinyu Liu, Zhida Han, Ping Zhang, Lei Guo, Xuefan Jiang, T. Zou, M. Zhu, C. R. Dela Cruz, X. Ke, Z. Q. Mao

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have investigated electronic and magnetic properties of iron pnictide CuxFe1+yAs, which is isostructural to iron pnictide superconductors LiFeAs and NaFeAs, using polycrystalline and single-crystal samples. We found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc∼42K, in contrast with the superconductivity in LiFeAs and NaFeAs. Its electronic transport properties exhibit quasi-two-dimensional characteristics: While the in-plane resistivity follows quadratic temperature dependence for T<10K, the c-axis resistivity shows nonmetal-to-metal crossover near 20 K. In addition, we have studied the Co-doping effect on CuxFe1+yAs and found that Co doping enhances the ferromagnetism with Tc increasing up to 83 K for CuxFe0.5Co0.5As. From these results, we discussed the origin of the ferromagnetism of CuxFe1+yAs and its relevance with the magnetism of iron pnictide superconductor parent compounds.

Original languageEnglish (US)
Article number014504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number1
DOIs
StatePublished - Jan 12 2015

Fingerprint

Group 5A compounds
Ferromagnetism
ferromagnetism
Iron
Doping (additives)
iron
Superconducting materials
Nonmetals
Electron correlations
electrical resistivity
Magnetism
Curie temperature
Superconductivity
electronics
Electronic properties
Transport properties
Magnetic properties
crossovers
superconductivity
transport properties

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Qian, Bin ; Hu, Jin ; Liu, Jinyu ; Han, Zhida ; Zhang, Ping ; Guo, Lei ; Jiang, Xuefan ; Zou, T. ; Zhu, M. ; Dela Cruz, C. R. ; Ke, X. ; Mao, Z. Q. / Weak ferromagnetism of Cux Fe1+yAs and its evolution with Co doping. In: Physical Review B - Condensed Matter and Materials Physics. 2015 ; Vol. 91, No. 1.
@article{b7438b869e214026af8faefac585f58f,
title = "Weak ferromagnetism of Cux Fe1+yAs and its evolution with Co doping",
abstract = "We have investigated electronic and magnetic properties of iron pnictide CuxFe1+yAs, which is isostructural to iron pnictide superconductors LiFeAs and NaFeAs, using polycrystalline and single-crystal samples. We found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc∼42K, in contrast with the superconductivity in LiFeAs and NaFeAs. Its electronic transport properties exhibit quasi-two-dimensional characteristics: While the in-plane resistivity follows quadratic temperature dependence for T<10K, the c-axis resistivity shows nonmetal-to-metal crossover near 20 K. In addition, we have studied the Co-doping effect on CuxFe1+yAs and found that Co doping enhances the ferromagnetism with Tc increasing up to 83 K for CuxFe0.5Co0.5As. From these results, we discussed the origin of the ferromagnetism of CuxFe1+yAs and its relevance with the magnetism of iron pnictide superconductor parent compounds.",
author = "Bin Qian and Jin Hu and Jinyu Liu and Zhida Han and Ping Zhang and Lei Guo and Xuefan Jiang and T. Zou and M. Zhu and {Dela Cruz}, {C. R.} and X. Ke and Mao, {Z. Q.}",
year = "2015",
month = "1",
day = "12",
doi = "10.1103/PhysRevB.91.014504",
language = "English (US)",
volume = "91",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "1",

}

Qian, B, Hu, J, Liu, J, Han, Z, Zhang, P, Guo, L, Jiang, X, Zou, T, Zhu, M, Dela Cruz, CR, Ke, X & Mao, ZQ 2015, 'Weak ferromagnetism of Cux Fe1+yAs and its evolution with Co doping', Physical Review B - Condensed Matter and Materials Physics, vol. 91, no. 1, 014504. https://doi.org/10.1103/PhysRevB.91.014504

Weak ferromagnetism of Cux Fe1+yAs and its evolution with Co doping. / Qian, Bin; Hu, Jin; Liu, Jinyu; Han, Zhida; Zhang, Ping; Guo, Lei; Jiang, Xuefan; Zou, T.; Zhu, M.; Dela Cruz, C. R.; Ke, X.; Mao, Z. Q.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 1, 014504, 12.01.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Weak ferromagnetism of Cux Fe1+yAs and its evolution with Co doping

AU - Qian, Bin

AU - Hu, Jin

AU - Liu, Jinyu

AU - Han, Zhida

AU - Zhang, Ping

AU - Guo, Lei

AU - Jiang, Xuefan

AU - Zou, T.

AU - Zhu, M.

AU - Dela Cruz, C. R.

AU - Ke, X.

AU - Mao, Z. Q.

PY - 2015/1/12

Y1 - 2015/1/12

N2 - We have investigated electronic and magnetic properties of iron pnictide CuxFe1+yAs, which is isostructural to iron pnictide superconductors LiFeAs and NaFeAs, using polycrystalline and single-crystal samples. We found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc∼42K, in contrast with the superconductivity in LiFeAs and NaFeAs. Its electronic transport properties exhibit quasi-two-dimensional characteristics: While the in-plane resistivity follows quadratic temperature dependence for T<10K, the c-axis resistivity shows nonmetal-to-metal crossover near 20 K. In addition, we have studied the Co-doping effect on CuxFe1+yAs and found that Co doping enhances the ferromagnetism with Tc increasing up to 83 K for CuxFe0.5Co0.5As. From these results, we discussed the origin of the ferromagnetism of CuxFe1+yAs and its relevance with the magnetism of iron pnictide superconductor parent compounds.

AB - We have investigated electronic and magnetic properties of iron pnictide CuxFe1+yAs, which is isostructural to iron pnictide superconductors LiFeAs and NaFeAs, using polycrystalline and single-crystal samples. We found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc∼42K, in contrast with the superconductivity in LiFeAs and NaFeAs. Its electronic transport properties exhibit quasi-two-dimensional characteristics: While the in-plane resistivity follows quadratic temperature dependence for T<10K, the c-axis resistivity shows nonmetal-to-metal crossover near 20 K. In addition, we have studied the Co-doping effect on CuxFe1+yAs and found that Co doping enhances the ferromagnetism with Tc increasing up to 83 K for CuxFe0.5Co0.5As. From these results, we discussed the origin of the ferromagnetism of CuxFe1+yAs and its relevance with the magnetism of iron pnictide superconductor parent compounds.

UR - http://www.scopus.com/inward/record.url?scp=84921038744&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921038744&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.91.014504

DO - 10.1103/PhysRevB.91.014504

M3 - Article

AN - SCOPUS:84921038744

VL - 91

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 1

M1 - 014504

ER -