A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh)

Wills, A. S.

doi:10.1016/s0921-4526(99)01722-6

Cited by 576 publications

(476 citation statements)

References 4 publications

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“…All measurements were conducted with a neutron wavelength of 2.41Å and a collimation of 12 -open-6 . The NPD data was analyzed using the Rietveld refinement program FullProf [25] and the representational analysis software SARAh [26].…”

Section: Methodsmentioning

confidence: 99%

Magnetic ordering in the frustratedJ1−J2Ising chain candidateBaNd2O4

Aczel

Garlea

et al. 2014

Phys. Rev. B

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The AR2O4 family (R = rare earth) have recently been attracting interest as a new series of frustrated magnets, with the magnetic R atoms forming zigzag chains running along the c-axis. We have investigated polycrystalline BaNd2O4 with a combination of magnetization, heat capacity, and neutron powder diffraction (NPD) measurements. Magnetic Bragg peaks are observed below TN = 1.7 K, and they can be indexed with a propagation vector of k = (0 1/2 1/2). The signal from magnetic diffraction is well described by long-range ordering of only one of the two types of Nd zigzag chains, with collinear up-up-down-down intrachain spin configurations (Double Néel state). Furthermore, low temperature magnetization and heat capacity measurements reveal two magnetic field-induced spin transitions at 2.75 T and 4 T for T = 0.46 K. The high field phase is paramagnetic, while the intermediate field state may arise from a spin transition of the long-range ordered Nd chains. One possible candidate for the field-induced ordered state corresponds to an up-up-down intrachain spin configuration, as predicted for a classical J1-J2 Ising chain with a Double Néel ground state in zero field.

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Section: Methodsmentioning

confidence: 99%

Magnetic ordering in the frustratedJ1−J2Ising chain candidateBaNd2O4

Aczel

Garlea

et al. 2014

Phys. Rev. B

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“…As the propagation vector is k = (0, 0, 0), the magnetic unit cell is identical to the nuclear cell. The whole symmetry analysis may be performed by hand [23] or by using one of the available computing programs doing the work automatically [24][25][26]. We use hereafter the program BasIreps [24].…”

Section: ------------------------------------------------------------mentioning

confidence: 99%

Symmetry and magnetic structures

Rodrı́guez-Carvajal

Bourée

2012

EPJ Web of Conferences

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“…Utilising version 2K of the representational analysis program SARAh [13], we have exploited the group theory approach to determine the magnetic structures allowed by symmetry. The results of the calculation show 3 possible irreducible representations (IR): Γ 2 , Γ 6 , Γ 8 that correspond to a G-type antiferromagnet where the moments are oriented along the [001], [-110] and [110] directions, respectively.…”

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confidence: 99%

On the magnetic structure of Sr₃Ir₂O₇: an x-ray resonant scattering study

Boseggia

Springell

Walker

et al. 2012

J. Phys.: Condens. Matter

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Abstract. This report presents azimuthal dependent and polarisation dependent xray resonant magnetic scattering at the Ir L 3 edge for the bilayered iridate compound, Sr 3 Ir 2 O 7 . Two magnetic wave vectors, k 1 =( 1 2 , 1 2 ,0) and k 2 =( 1 2 ,-1 2 ,0), result in domains of two symmetry-related G-type antiferromagnetic structures, noted A and B, respectively. These domains are approximately 0.02 mm 2 and are independent of the thermal history. An understanding of this key aspect of the magnetism is necessary for an overall picture of the magnetic behaviour in this compound. Azimuthal and polarisation dependence of magnetic reflections, relating to both magnetic wave vectors, show that the Ir magnetic moments in the bilayer compound are oriented along the c axis. This contrasts with single layer Sr 2 IrO 4 where the moments are confined to the ab plane.

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A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh)

Cited by 576 publications

References 4 publications

Magnetic ordering in the frustratedJ1−J2Ising chain candidateBaNd2O4

Magnetic ordering in the frustratedJ1−J2Ising chain candidateBaNd2O4

Symmetry and magnetic structures

On the magnetic structure of Sr₃Ir₂O₇: an x-ray resonant scattering study

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A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh)

Cited by 576 publications

References 4 publications

Magnetic ordering in the frustratedJ1−J2Ising chain candidateBaNd2O4

Magnetic ordering in the frustratedJ1−J2Ising chain candidateBaNd2O4

Symmetry and magnetic structures

On the magnetic structure of Sr3Ir2O7: an x-ray resonant scattering study

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On the magnetic structure of Sr₃Ir₂O₇: an x-ray resonant scattering study