Weak ferromagnetism of 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. Here, we found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc ~ 42 K, 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 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.
- Authors:
-
- Changshu Institute of Technology (China); Tulane University, New Orleans, LA (United States)
- Tulane University, New Orleans, LA (United States)
- Changshu Institute of Technology (China)
- Michigan State University, East Lansing, MI (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Louisiana State Univ., Baton Rouge, LA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1670464
- Alternate Identifier(s):
- OSTI ID: 1180407
- Grant/Contract Number:
- SC0012432
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 1; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Qian, Bin, Hu, Jin, Liu, Jinyu, Han, Zhida, Zhang, Ping, Guo, Lei, Jiang, Xuefan, Zou, T., Zhu, M., Dela Cruz, C. R., Ke, X., and Mao, Z. Q. Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping. United States: N. p., 2015.
Web. doi:10.1103/physrevb.91.014504.
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 Cu x Fe 1 + y As and its evolution with Co doping. United States. https://doi.org/10.1103/physrevb.91.014504
Qian, Bin, Hu, Jin, Liu, Jinyu, Han, Zhida, Zhang, Ping, Guo, Lei, Jiang, Xuefan, Zou, T., Zhu, M., Dela Cruz, C. R., Ke, X., and Mao, Z. Q. Mon .
"Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping". United States. https://doi.org/10.1103/physrevb.91.014504. https://www.osti.gov/servlets/purl/1670464.
@article{osti_1670464,
title = {Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping},
author = {Qian, Bin and Hu, Jin and Liu, Jinyu and Han, Zhida and Zhang, Ping and Guo, Lei and Jiang, Xuefan and Zou, T. and Zhu, M. and Dela Cruz, C. R. and Ke, X. and Mao, Z. Q.},
abstractNote = {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. Here, we found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc ~ 42 K, 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 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.},
doi = {10.1103/physrevb.91.014504},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 1,
volume = 91,
place = {United States},
year = {Mon Jan 12 00:00:00 EST 2015},
month = {Mon Jan 12 00:00:00 EST 2015}
}
Web of Science
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