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Title: Neutron scattering study on the field-induced O{sub xy}-type antiferroquadrupolar ordering of the heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}

Abstract

Neutron scattering experiments have revealed a field-induced antiferroquadrupolar order parameter in the Pr-based heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}. We observed the field-induced antiferromagnetic dipole moment with the propagation vector q=(100) for the applied field direction both H parallel [110] and [001]. For H parallel [110] at 8 T, it should be noted that the induced antiferromagnetic moment of 0.16(10) {mu}{sub B}/Pr orients parallel to the field within our experimental accuracy. This observation is strong evidence that the O{sub xy} electric quadrupole is the primary order parameter for H parallel [110]. A mean-field calculation, based on {gamma}{sub 1} singlet and {gamma}{sub 4}{sup (2)} excited triplet with the O{sub xy} quadrupolar interaction, reproduces the induced moment direction and its field response. These facts indicate the predominance of O{sub xy}-type antiferroquadrupolar interaction in PrOs{sub 4}Sb{sub 12}.

Authors:
;  [1];  [1];  [2]; ; ;  [3];  [4]
  1. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195 (Japan)
  2. (Japan)
  3. Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397 (Japan)
  4. DRFMC-CEA, 38054 Grenoble (France)
Publication Date:
OSTI Identifier:
20976723
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 75; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevB.75.094408; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; DIPOLE MOMENTS; FERMIONS; MAGNETIC MOMENTS; MEAN-FIELD THEORY; NEUTRON DIFFRACTION; ORDER PARAMETERS; OSMIUM COMPOUNDS; PRASEODYMIUM COMPOUNDS; QUADRUPOLES; SUPERCONDUCTORS; TRIPLETS; VECTORS

Citation Formats

Kaneko, K., Matsuda, T. D., Metoki, N., Department of Physics, Tohoku University, Sendai 980-8578, Shiina, R., Kohgi, M., Kuwahara, K., and Bernhoeft, N. Neutron scattering study on the field-induced O{sub xy}-type antiferroquadrupolar ordering of the heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVB.75.094408.
Kaneko, K., Matsuda, T. D., Metoki, N., Department of Physics, Tohoku University, Sendai 980-8578, Shiina, R., Kohgi, M., Kuwahara, K., & Bernhoeft, N. Neutron scattering study on the field-induced O{sub xy}-type antiferroquadrupolar ordering of the heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}. United States. doi:10.1103/PHYSREVB.75.094408.
Kaneko, K., Matsuda, T. D., Metoki, N., Department of Physics, Tohoku University, Sendai 980-8578, Shiina, R., Kohgi, M., Kuwahara, K., and Bernhoeft, N. Thu . "Neutron scattering study on the field-induced O{sub xy}-type antiferroquadrupolar ordering of the heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}". United States. doi:10.1103/PHYSREVB.75.094408.
@article{osti_20976723,
title = {Neutron scattering study on the field-induced O{sub xy}-type antiferroquadrupolar ordering of the heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}},
author = {Kaneko, K. and Matsuda, T. D. and Metoki, N. and Department of Physics, Tohoku University, Sendai 980-8578 and Shiina, R. and Kohgi, M. and Kuwahara, K. and Bernhoeft, N.},
abstractNote = {Neutron scattering experiments have revealed a field-induced antiferroquadrupolar order parameter in the Pr-based heavy-fermion superconductor PrOs{sub 4}Sb{sub 12}. We observed the field-induced antiferromagnetic dipole moment with the propagation vector q=(100) for the applied field direction both H parallel [110] and [001]. For H parallel [110] at 8 T, it should be noted that the induced antiferromagnetic moment of 0.16(10) {mu}{sub B}/Pr orients parallel to the field within our experimental accuracy. This observation is strong evidence that the O{sub xy} electric quadrupole is the primary order parameter for H parallel [110]. A mean-field calculation, based on {gamma}{sub 1} singlet and {gamma}{sub 4}{sup (2)} excited triplet with the O{sub xy} quadrupolar interaction, reproduces the induced moment direction and its field response. These facts indicate the predominance of O{sub xy}-type antiferroquadrupolar interaction in PrOs{sub 4}Sb{sub 12}.},
doi = {10.1103/PHYSREVB.75.094408},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 9,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}
  • No abstract prepared.
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  • Using neutron scattering techniques, we show that the destruction of superconductivity in ErRh/sub 4/B/sub 4/ at T/sub c/ = 1.0 K is accompanied by the development of long-range ferromagnetic ordering of the Er sublattice. The observed magnetic Bragg intensities indicate that the Er ion has a moment of 5.6..mu../sub B/ which is oriented in the tetragonal basal plane. The magnetic transition appears second order, but shows anomalously strong precusor scattering.
  • The cation ordering in the fluorite-like transparent conductors In{sub 4+} {sub x} Sn{sub 3-2} {sub x} Sb {sub x} O{sub 12} and In{sub 6}TeO{sub 12}, was investigated by Time of Flight Neutron Powder Diffraction and X-ray Powder Diffraction (tellurate). The structural results including atomic positions, cation distributions, metal-oxygen distances and metal-oxygen-metal angles point to a progressive cation ordering on both sites of the Tb{sub 7}O{sub 12}-type structure with a strong preference of the smaller 4d {sup 10} cations (Sn{sup 4+}, Sb{sup 5+}, Te{sup 6+}) for the octahedral sites. The corresponding increase of the overall structure-bonding anisotropy is analyzed in termsmore » of the crystal chemical properties of the OM {sub 4} tetrahedral network of the antistructure. The relationships between the M {sub 7}O{sub 12} and the M {sub 2}O{sub 3} bixbyite-type structures are explored. Within the whole series of compositions In{sub 4+} {sub x}M {sub 3-} {sub x} O{sub 12} (M=Sn, Sb, Te) there exists an increase of the symmetry gap between the more symmetrical bixbyite structure and the M {sub 7}O{sub 12} type. This is tentatively correlated with the progressive weakening of thermal stability of these compositions from Sn to Te via Sb. - Graphical abstract: Hexagonal cell of the fluorite-like oxygen-deficient M {sub 7}O{sub 12} structure: symmetrical octahedra and distorted sevenfold-coordinated polyhedra are shown.« less
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