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Order parameter segregation in Ce0.7La0.3B6 : 4f octopole and 5d dipole magnetic order

Mannix, D. LU ; Tanaka, Y. ; Carbone, D. LU ; Bernhoeft, N. and Kunii, S. (2005) In Physical Review Letters 95(11).
Abstract

The intriguing thermophysical properties of CeB6 have been subject to investigation for more than 20 years. In particular, an exotic ground state, phase IV, emerges under doping with La. We report resonant x-ray scattering results on the order parameter symmetries in phase IV of Ce0.7La0.3B6, which condenses below TIV=1.5K. The results reveal a degree of mesoscopic 5d dipole antiferromagnetic order, with propagation vector Q0=(121212), both below and above TIV. Below TIV, this polarization coexists with long-range 4f antiferro-octupole (AFO) order also at Q0. The marked differences in temperature dependence and spatial correlation suggest a state of order parameter segregation at low temperature. A simple model of AFO order, consistent... (More)

The intriguing thermophysical properties of CeB6 have been subject to investigation for more than 20 years. In particular, an exotic ground state, phase IV, emerges under doping with La. We report resonant x-ray scattering results on the order parameter symmetries in phase IV of Ce0.7La0.3B6, which condenses below TIV=1.5K. The results reveal a degree of mesoscopic 5d dipole antiferromagnetic order, with propagation vector Q0=(121212), both below and above TIV. Below TIV, this polarization coexists with long-range 4f antiferro-octupole (AFO) order also at Q0. The marked differences in temperature dependence and spatial correlation suggest a state of order parameter segregation at low temperature. A simple model of AFO order, consistent with the polarization dependent azimuth symmetries, the Bragg angle, and temperature dependence is given.

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author
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publishing date
type
Contribution to journal
publication status
published
in
Physical Review Letters
volume
95
issue
11
article number
117206
publisher
American Physical Society
external identifiers
  • scopus:27144499168
ISSN
0031-9007
DOI
10.1103/PhysRevLett.95.117206
language
English
LU publication?
no
id
e2ed2c39-63cd-4ad0-8049-cc954b414171
date added to LUP
2021-12-15 11:52:17
date last changed
2022-06-07 22:06:38
@article{e2ed2c39-63cd-4ad0-8049-cc954b414171,
  abstract     = {{<p>The intriguing thermophysical properties of CeB6 have been subject to investigation for more than 20 years. In particular, an exotic ground state, phase IV, emerges under doping with La. We report resonant x-ray scattering results on the order parameter symmetries in phase IV of Ce0.7La0.3B6, which condenses below TIV=1.5K. The results reveal a degree of mesoscopic 5d dipole antiferromagnetic order, with propagation vector Q0=(121212), both below and above TIV. Below TIV, this polarization coexists with long-range 4f antiferro-octupole (AFO) order also at Q0. The marked differences in temperature dependence and spatial correlation suggest a state of order parameter segregation at low temperature. A simple model of AFO order, consistent with the polarization dependent azimuth symmetries, the Bragg angle, and temperature dependence is given.</p>}},
  author       = {{Mannix, D. and Tanaka, Y. and Carbone, D. and Bernhoeft, N. and Kunii, S.}},
  issn         = {{0031-9007}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{11}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Order parameter segregation in Ce0.7La0.3B6 : 4f octopole and 5d dipole magnetic order}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.95.117206}},
  doi          = {{10.1103/PhysRevLett.95.117206}},
  volume       = {{95}},
  year         = {{2005}},
}