Stripelike magnetism in a mixed-valence insulating state of the Fe-based ladder compound CsFe 2Se 3

Fei Du, Kenya Ohgushi, Yusuke Nambu, Takateru Kawakami, Maxim Avdeev, Yasuyuki Hirata, Yoshitaka Watanabe, Taku J. Sato, Yutaka Ueda

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Structural and electronic properties of the Fe-based spin-ladder compound CsFe 2Se 3 was investigated by means of resistivity, susceptibility, specific heat, Mössbauer, and neutron diffraction measurements. Despite the single-site nature in a mixed-valence state, the ground state is a magnetic insulator characterized by a charge gap ∼0.34 eV and an antiferromagnetic transition temperature 175 K. The magnetic structure was stripelike, with magnetic moments of 1.77(6)μ B coupled ferromagnetically (antiferromagnetically) along the rung (leg) direction. Both the insulating behavior and stripelike ordering can be understood by assuming extra carriers delocalized on the rung. Our findings reveal that CsFe 2Se 3 is an appealing compound with the stripelike magnetic structure in an insulating state among Fe-based compounds, and provide significant supplemental insight into the magnetism of Fe-based superconductors.

Original languageEnglish
Article number214436
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number21
DOIs
Publication statusPublished - 2012 Jun 28

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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