Magnetic structure of solid 3He observed by neutron diffraction

Neutron-diffraction measurements have been performed on a 3He crystal below the magnetic-ordering transition. The measurements have allowed, for the first time, the observation of a magnetic signal. They prove directly the occurrence of an antiferromagnetic order with a propagation vector (1/2, 0, 0).

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Non-collinear antiferromagnetism in FeCrAs Special issue on Neutron Scattering in Canada.

Canadian Journal of Physics ◽

10.1139/p09-050 ◽

2010 ◽

Vol 88 (10) ◽

pp. 701-706 ◽

Cited By ~ 10

Author(s):

Ian P. Swainson ◽

Wenlong Wu ◽

Alix McCollam ◽

Stephen R. Julian

Keyword(s):

Magnetic Structure ◽

Magnetic Ordering ◽

Neutron Powder Diffraction ◽

Antiferromagnetic Order ◽

Tetrahedral Coordination ◽

Zone Boundary ◽

Special Issue ◽

Geometric Frustration ◽

Ordering Transition ◽

Magnetic Satellite

FeCrAs undergoes a magnetic ordering transition at TN ≃ 125 K. The magnetic structure of FeCrAs, which crystallizes in space group [Formula: see text] and is isostructural to Fe2P, was determined by constant wavelength neutron powder diffraction. A single basis function was found to describe the intensity distribution in the magnetic satellite reflections, which are associated with propagation vector k = (1/3, 1/3, 0), representing a K-point zone-boundary ordering. The magnetic intensity could be modelled by moments from Cr only, which lie on the 3g-sites, in pyramidal coordination by As, whereas the moments on Fe, in tetrahedral coordination on the 3f-sites, were found to be so small as to be zero within error. This agrees with previous Mössbauer spectroscopy measurements on this compound. The magnetic structure is characterized by non-collinear antiferromagnetic order of the moments, all of which lie in the hexagonal plane. This does not appear to have been observed in other monopnictides with Fe2P structure but is consistent with geometric frustration of antiferromagnetic interactions.

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Complex magnetic ordering inNdNi1−xCux: Determination of the magnetic structure by neutron diffraction

Physical Review B ◽

10.1103/physrevb.70.224411 ◽

2004 ◽

Vol 70 (22) ◽

Cited By ~ 4

Author(s):

J. García Soldevilla ◽

J. A. Blanco ◽

J. Rodríguez Fernández ◽

J. I. Espeso ◽

J. C. Gómez Sal ◽

...

Keyword(s):

Neutron Diffraction ◽

Magnetic Structure ◽

Magnetic Ordering

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Neutron diffraction study of the magnetic structure of the superconducting Ru-1222-type ruthenocuprateRuSr2Y1.5Ce0.5Cu2O10−δ: Evidence for long-range antiferromagnetic order

Physical Review B ◽

10.1103/physrevb.78.094501 ◽

2008 ◽

Vol 78 (9) ◽

Cited By ~ 17

Author(s):

A. C. Mclaughlin ◽

I. Felner ◽

V. P. S. Awana

Keyword(s):

Neutron Diffraction ◽

Diffraction Study ◽

Magnetic Structure ◽

Long Range ◽

Neutron Diffraction Study ◽

Antiferromagnetic Order

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The magnetic structure of braunite Mn2+Mn3+6O8/SiO4

Zeitschrift für Kristallographie - Crystalline Materials ◽

10.1524/zkri.1998.213.1.19 ◽

1998 ◽

Vol 213 (1) ◽

Cited By ~ 4

Author(s):

S. Ohmann ◽

I. Abs-Wurmbach ◽

N. Stüßer ◽

T. M. Sabine ◽

K. Westerholt

Keyword(s):

Neutron Diffraction ◽

Magnetic Structure ◽

Powder Diffraction ◽

Diffraction Data ◽

Magnetic Moments ◽

Magnetic Ordering ◽

Neutron Powder Diffraction ◽

Powder Diffraction Data ◽

Neutron Powder Diffraction Data ◽

Weakly Coupled

AbstractNeutron powder diffraction data of braunite MnThe magnetic structure is dominated by the magnetic ordering of the A layers thus reflecting the relations of the chemical cell: Within the (001) plane of the A sheets magnetic moments of the two nonequivalent MnMagnetization experiments indicate that besides the afordered Mn ions weakly coupled spins ordering at temperatures below 2 K exist. In accordance with that, additional neutron diffraction reflections arise at

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Crystal Structure and Magnetic Ordering in Multiferroic (0.9)BiFeO3 + (0.1)BaTiO3

Materials Science Forum ◽

10.4028/www.scientific.net/msf.845.38 ◽

2016 ◽

Vol 845 ◽

pp. 38-41

Author(s):

Seong Su Lee ◽

Mikhail A. Semkin ◽

Alexander N. Pirogov

Keyword(s):

Crystal Structure ◽

Neutron Diffraction ◽

Temperature Dependence ◽

Magnetic Structure ◽

Temperature Region ◽

Magnetic Moment ◽

Magnetic Ordering ◽

Structure Parameters ◽

Crystal And Magnetic Structure ◽

The Moment

Neutron diffraction has been carried out to study temperature evolution of crystal and magnetic structure parameters of the multiferroic (0.9)BiFeO3 + (0.1)BaTiO3 over region (300 – 1000) K. Crystal structure is rhombohedral over whole temperature region and it is described by the R3c space group. The lattice parameters increase with temperature. The Ba ions are placed in the Bi sublattice and the Ti ions partly occupy the Fe sublattice. Assuming that the sample has a modulated magnetic structure with the propagation vector k = [0.0045, 0.0045, 0], we obtained a temperature dependence of the Fe-ion magnetic moment. The value of the moment is equaled to be μ = (3.46 ± 0.05) μB at 300 K and becomes zero at 600 K.

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Non-collinear magnetic structure of manganese quadruple perovskite CdMn7O12

Scientific Reports ◽

10.1038/srep45939 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 3

Author(s):

H. Guo ◽

M. T. Fernández-Díaz ◽

L. Zhou ◽

Y. Yin ◽

Y. Long ◽

...

Keyword(s):

Phase Transition ◽

Phase Separation ◽

Neutron Diffraction ◽

Magnetic Structure ◽

Structural Phase Transition ◽

Magnetic Moments ◽

Structural Phase ◽

Powder Neutron Diffraction ◽

Propagation Vector ◽

Absorbing Material

Abstract We report on the magnetic structure of CdMn7O12 determined by powder neutron diffraction. We were able to measure the magnetic structure of this Cd containing and highly neutron absorbing material by optimizing the sample geometry and by blending the CdMn7O12 with Aluminum powder. Below its Néel temperature T N1 all magnetic reflections can be indexed by a single commensurate propagation vector k = (0, 0, 1). This is different to the case of CaMn7O12 where the propagation vector is incommensurate and where an in-plane helical magnetic structure has been found. We observe a commensurate non-collinear magnetic structure in CdMn7O12 with in-plane aligned magnetic moments resembling the ones in CaMn7O12. However, the commensurate propagation vector prevents the appearance of a helical magnetic structure in CdMn7O12. Finally, we also observe a third structural phase transition below ~60 K that can be attributed to phase separation.

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Magnetic Order in Quaternary NiMnGe:T (T = Cr, Ti) Compounds

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.289.156 ◽

2019 ◽

Vol 289 ◽

pp. 156-163

Author(s):

Andrzej Szytuła ◽

Stanislav Baran ◽

Bogusław Penc ◽

Andreas Hoser ◽

Vladimir Dyakonov

Keyword(s):

Simple Model ◽

Neutron Diffraction ◽

Magnetic Structure ◽

Magnetic Order ◽

Magnetic Interactions ◽

Néel Temperature ◽

Cr Content ◽

Propagation Vector ◽

Cr System ◽

Ti Content

The work reports the results of neutron diffraction measurements of NiMnGe:T systems where T is Cr or Ti. All investigated compounds have the helicoidal magnetic structure with the propagation vector k = (ka,0,0). The values of the ka component decrease with increasing Cr content and increase with increasing Ti content. For all compounds, except the sample with x = 0.18 in Cr-system, the helicoidal order is stable up to the Néel temperature. The obtained data are analysed based on simple model in which the magnetic interactions are described by two exchange integrals J1 > 0 for first and J2 < 0 for second neighbouring moments. This model clears up different dependence of ka component in different systems.

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