Design of the cold neutron triple-axis spectrometer at the China Advanced Research Reactor

Cheng, Peng; Zhang, Hongxia; Bao, Wan-Su; Schneidewind, A.; Link, P.; Grünwald, Annette; Georgii, R.; Hao, Lijie; Liu, Y.T.

doi:10.1016/j.nima.2016.03.045

Cited by 20 publications

(9 citation statements)

References 15 publications

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“…The powder neutron diffraction experiments were carried out on Xingzhi cold neutron triple-axis spectrometer at the China Advanced Research Reactor (CARR). For neutron experiments on Xingzhi, the incident neutron energy was fixed at 16 meV with a neutron velocity selector used upstream to remove higher order neutrons [20]. About 3 g Fe 2 SiSe 4 powders (crushed from single crystals) were used in neutron experiments.…”

Section: Experimental Methodsmentioning

confidence: 99%

Multiple magnetic transitions and complex magnetic structures in Fe$_2$SiSe$_4$ with the sawtooth lattice

Pan¹,

Hu²,

Huang³

et al. 2023

Preprint

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The sawtooth lattice shares some structural similarities with the kagome lattice and may attract renewed research interest. Here, we report a comprehensive study on the physical properties of Fe2SiSe4, an unexplored member in the olivine chalcogenides with the sawtooth lattice of Fe. Our results show that Fe2SiSe4 is a magnetic semiconductor with band gap of 0.66 eV. It first undergoes an antiferromagnetic transition at Tm1=110 K, then an ferrimagnetic-like one at Tm2=50 K and finally a magnetic transition at Tm3=25 K which is likely driven by the thermal populations of spin-orbit manifold on the Fe site. Neutron diffraction analysis reveals a non-collinear antiferromagnetic structure with propagation vector q1=(0,0,0) at Tm2

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Section: Experimental Methodsmentioning

confidence: 99%

Multiple magnetic transitions and complex magnetic structures in Fe$_2$SiSe$_4$ with the sawtooth lattice

Pan¹,

Hu²,

Huang³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Magnetization measurements were carried out in Quantum Design MPMS3 and PPMS-14T. The powder neutron diffraction experiments were carried out on Xingzhi triple-axis spectrometer [46] at the China Advanced Research Reactor (CARR) and Xuanwu powder neutron diffraction spectrometer at China Academy of Engineering Physics (CAEP). Approximate 3.8 g of Dy 2 O 2 Te powder sample sealed in a cylindrical vanadium or aluminium container was loaded into a closed cycle refrigerator that regulates the sample temperature from 3.5 K to 300 K. For neutron experiments on Xingzhi, a neutron velocity selector was used upstream to cleanly remove higher order neutrons for the incident neutron energy fixed at 15 meV [46].…”

Section: Experimental Methodsmentioning

confidence: 99%

Antiferromagnetic structure and magnetic properties of Dy2O2Te: An isostructural analog of the rare-earth superconductors R2O2Bi

Liu,

Huang,

Sheng

et al. 2022

Preprint

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The rare-earth compounds R2O2Bi (R = Tb, Dy, Er, Lu, Y) are newly discovered superconductors in the vicinity of a rare-earth magnetic long-range order. In this work, we determined the magnetic order of the parent compound Dy2O2Te by neutron scattering as the A-type antiferromagnetic structure below the Néel temperature TN = 9.7 K. The large staggered magnetic moment 9.4(1)µB per Dy at T = 3.5 K lies in the basal ab-plane. In a magnetic field, anomalous magnetic properties including the bifurcation between zero-field and field cooling magnetization, a butterfly-shaped magnetic hysteresis and slow magnetic relaxation emerge, which are related to the field-induced metamagnetic transitions in Dy2O2Te. Our experimental findings would stimulate further research on the relation between antiferromagnetism and superconductivity in these rare-earth compounds.

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“…For neutron experiments on Xingzhi (Data presented in Fig. 2), the incident neutron energy was fixed at 15 meV with a neutron velocity selector used upstream to remove higher order neutrons [25]. Approximate 4 g of DyOCl powder sample sealed in a cylindrical aluminium container was loaded into a closed cycle refrigerator that regulates the temperature from 3.5 K to 300 K. Because the dysprosium (Dy) is highly neutron absorbing, the absorption correction was applied to neutron powder diffraction data.…”

Section: Methodsmentioning

confidence: 99%

DyOCl: a rare-earth based two-dimensional van der Waals material with strong magnetic anisotropy

Tian,

Pan,

et al. 2021

Preprint

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Comparing with the widely known transitional metal based van der Waals (vdW) materials, rareearth based ones are rarely explored in the research of intrinsic two-dimensional (2D) magnetism. In this work, we report the physical properties of DyOCl, a rare-earth based vdW magnetic insulator with direct band gap of ∼ 5.72 eV . The magnetic order of bulk DyOCl is determined by neutron scattering as the A-type antiferromagnetic structure below the Néel temperature TN = 10 K. The large magnetic moment near 10.1 µB/Dy lies parallel to the a-axis with strong uniaxial magnetic anisotropy. At 2 K, a moderate magnetic field (∼ 2 T ) applied along the easy axis generates spin-flip transitions and polarizes DyOCl to a ferromagnetic state. Density functional theory calculations reveal an extremely large magnetic anisotropy energy (−5850 µeV /Dy) for DyOCl, indicating the great potentials to realize magnetism in 2D limit. Furthermore, the mechanical exfoliation of bulk DyOCl single crystals down to seven layers is demonstrated. Our findings suggest DyOCl is a promising material playground to investigate 2D f -electron magnetism and spintronic applications at the nanoscale.

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Design of the cold neutron triple-axis spectrometer at the China Advanced Research Reactor

Cited by 20 publications

References 15 publications

Multiple magnetic transitions and complex magnetic structures in Fe$_2$SiSe$_4$ with the sawtooth lattice

Multiple magnetic transitions and complex magnetic structures in Fe$_2$SiSe$_4$ with the sawtooth lattice

Antiferromagnetic structure and magnetic properties of Dy2O2Te: An isostructural analog of the rare-earth superconductors R2O2Bi

DyOCl: a rare-earth based two-dimensional van der Waals material with strong magnetic anisotropy

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