Complex magnetic ordering in CeFe_1.76 studied by neutron diffraction

Journal Article · Wed Oct 01 00:00:00 EDT 2014 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.90.134423· OSTI ID:1166927

Jayasekara, Wageesha T ^[1]; Tian, W ^[2]; Hodovanets, Halyna ^[1]; Canfield, Paul C ^[1]; Bud'ko, Serguei L ^[1]; Kreyssig, Andreas ^[1]; Goldman, Alan I ^[1]

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1. Ames Laboratory
2. Oak Ridge National Laboratory

Neutron diffraction measurements on a single crystal of CeGe_1.76 reveal a complex series of magnetic transitions at low temperature. At T_N≈7 K, there is a transition from a paramagnetic state at higher temperature to an incommensurate magnetic structure characterized by a magnetic propagation vector (0 0 _τ) with τ≈1/4 and the magnetic moment along the a axis of the orthorhombic unit cell. Below T_LI≈5 K, the magnetic structure locks in to a commensurate structure with τ=1/4 and the magnetic moment remains along the a axis. Below T≈4 K, we find additional half-integer and integer indexed magnetic Bragg peaks consistent with a second commensurately ordered antiferromagnetic state.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11358
• OSTI ID: 1166927
• Report Number(s): IS-J 8528; ArticleNumber: 134423
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 13 Vol. 90; ISSN 1098-0121; ISSN PRBMDO
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE