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Title: Magnetic and structural transitions in La0.4Na0.6Fe2As2 single crystals

Abstract

La0.4Na0.6Fe2As2 single crystals have been grown out of an NaAs flux in an alumina crucible and characterized by measuring magnetic susceptibility, electrical resistivity, specific heat, as well as single-crystal x-ray and neutron diffraction. La0.4Na0.6Fe2As2 single crystals show a structural phase transition from a high-temperature tetragonal phase to a low-temperature orthorhombic phase at Ts=125 K. This structural transition is accompanied by an anomaly in the temperature dependence of electrical resistivity, anisotropic magnetic susceptibility, and specific heat. Concomitant with the structural phase transition, the Fe moments order along the a direction with an ordered moment of 0.7(1) μB at T=5 K. Finally, the low-temperature stripe antiferromagnetic structure is the same as that in other AFe2As2 (A = Ca, Sr, Ba) compounds. La0.5₋xNa0.5+xFe2As2 provides a material platform for the study of iron-based superconductors where the electron-hole asymmetry could be studied by simply varying the La/Na ratio.

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];  [2];  [4];  [2];  [6];  [6];  [3];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  2. Julich Research Centre (Germany). Julich Centre for Neutron Science (JCNS). Peter Grunberg Inst. PGI, JARA-FIT; Julich Research Centre (Germany). Outstation Juelich Centre for Neutron Science (JCNS), Forschungszentrum Julich GmbH
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  4. Julich Research Centre (Germany). Outstation Juelich Centre for Neutron Science (JCNS), Forschungszentrum Julich GmbH
  5. Julich Research Centre (Germany). Julich Centre for Neutron Science (JCNS). Peter Grunberg Inst. PGI, JARA-FIT
  6. Ames Lab., Ames, IA (United States). Division of Materials Science and Engineering; Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1185775
Alternate Identifier(s):
OSTI ID: 1179998
Grant/Contract Number:  
AC05-00OR22725; AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Yan, Jiaqiang, Nandi, S., Saparov, Bayrammurad I., Cermak, P., Xiao, Y., Su, Y., Jin, W. T., Schneidewind, A., Bruckel, Th., McCallum, R. W., Lograsso, Thomas A., Sales, B. C., and Mandrus, D. G. Magnetic and structural transitions in La0.4Na0.6Fe2As2 single crystals. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.024501.
Yan, Jiaqiang, Nandi, S., Saparov, Bayrammurad I., Cermak, P., Xiao, Y., Su, Y., Jin, W. T., Schneidewind, A., Bruckel, Th., McCallum, R. W., Lograsso, Thomas A., Sales, B. C., & Mandrus, D. G. Magnetic and structural transitions in La0.4Na0.6Fe2As2 single crystals. United States. doi:10.1103/PhysRevB.91.024501.
Yan, Jiaqiang, Nandi, S., Saparov, Bayrammurad I., Cermak, P., Xiao, Y., Su, Y., Jin, W. T., Schneidewind, A., Bruckel, Th., McCallum, R. W., Lograsso, Thomas A., Sales, B. C., and Mandrus, D. G. Mon . "Magnetic and structural transitions in La0.4Na0.6Fe2As2 single crystals". United States. doi:10.1103/PhysRevB.91.024501. https://www.osti.gov/servlets/purl/1185775.
@article{osti_1185775,
title = {Magnetic and structural transitions in La0.4Na0.6Fe2As2 single crystals},
author = {Yan, Jiaqiang and Nandi, S. and Saparov, Bayrammurad I. and Cermak, P. and Xiao, Y. and Su, Y. and Jin, W. T. and Schneidewind, A. and Bruckel, Th. and McCallum, R. W. and Lograsso, Thomas A. and Sales, B. C. and Mandrus, D. G.},
abstractNote = {La0.4Na0.6Fe2As2 single crystals have been grown out of an NaAs flux in an alumina crucible and characterized by measuring magnetic susceptibility, electrical resistivity, specific heat, as well as single-crystal x-ray and neutron diffraction. La0.4Na0.6Fe2As2 single crystals show a structural phase transition from a high-temperature tetragonal phase to a low-temperature orthorhombic phase at Ts=125 K. This structural transition is accompanied by an anomaly in the temperature dependence of electrical resistivity, anisotropic magnetic susceptibility, and specific heat. Concomitant with the structural phase transition, the Fe moments order along the a direction with an ordered moment of 0.7(1) μB at T=5 K. Finally, the low-temperature stripe antiferromagnetic structure is the same as that in other AFe2As2 (A = Ca, Sr, Ba) compounds. La0.5₋xNa0.5+xFe2As2 provides a material platform for the study of iron-based superconductors where the electron-hole asymmetry could be studied by simply varying the La/Na ratio.},
doi = {10.1103/PhysRevB.91.024501},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 2,
volume = 91,
place = {United States},
year = {2015},
month = {1}
}

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