Neutron-polarization-analysis study of the spin structure of Cu-Mn spin-glasses

Cable, J. W.; Werner, S.; Felcher, G. P.; Wakabayashi, N.

doi:10.1103/physrevb.29.1268

Cited by 98 publications

(41 citation statements)

References 31 publications

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“…Magnetic and atomic short-range order (SRO) was studied in this system over 30 years. The presence of the atomic short-range order (ASRO) and the magnetic order of the type of incommensurate spin density wave (ISDW) was demonstrated for Mn content up to 0.40 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. More detailed study concerns alloys with the Mn content up to x = 0.25.…”

Section: Introductionmentioning

confidence: 99%

Diffuse Neutron Scattering in the Mn_0.4Cu_0.6Alloy

Jankowska-Kisielińska

Mikke

Fijał-Kirejczyk

2008

Acta Phys. Pol. A

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The diffuse neutron scattering in the Mn 0.4 Cu 0.6 alloy was measured in the temperature range 15-390 K at the 3-axis neutron spectrometer at MARIA reactor inŚwierk. The broad maxima of the neutron intensity were observed in the surrounding of the (0.5,1,0) reciprocal lattice point and other symmetry related points. The effect is similar to that observed in Mn-Cu alloys with lower Mn content at room temperature. Our results are in agreement with the earlier finding that the maxima of the short--range order incommensurate spin density wave scattering are placed at the (0.5 ± δ,1,0) reciprocal lattice point with a linear dependence of δ on the Mn concentration. In addition, some commensurate antiferromagnetic short--range order was found.

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Section: Introductionmentioning

confidence: 99%

Diffuse Neutron Scattering in the Mn_0.4Cu_0.6Alloy

Jankowska-Kisielińska

Mikke

Fijał-Kirejczyk

2008

Acta Phys. Pol. A

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“…The differences between the fitting parameters for the reference and irradiated samples are significant -greater than the errors-for α 3 , α 5 and α 6 . The fact that these changes are most pronounced for the larger radius shells is consistent with developing order in a superlattice with a large cell.…”

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confidence: 88%

“…In the case of CuMn alloys, however, no such distinct satellite peaks have been observed. A slight elongation of the (1 [21], but the peak shape is almost spherical for the Cu 75 Mn 25 alloy [3]. This superstructure is thought to arise in the flattened portions of the Fermi surface in 1 1 0 k-space directions near the Brillouin zone boundary, causing minima in the Fouriertransformed pair interaction energy to shift slightly from the special points ( 1 1 2 0 in this case) dictated by lattice symmetry [8].…”

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confidence: 99%

“…[10]. The proposal that CuMn microdomains generate the observed ASRO [3,11] is interesting, as a study of Cu 83 Mn 17 by small-angle neutron scattering [12] showed that clusters or microdomains of low dimensionality and radius of gyration about 25Å exist. Their composition was estimated to be Cu 74 Mn 26 .…”

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confidence: 99%

“…A large part of the interest in CuMn has been in the atomic short-range order (ASRO) and accompanying magnetic short-range order shown to be present in the system by many neutron scattering experiments, e.g. [1][2][3]. CuMn alloys are ideal candidates for neutron scattering studies of short-range order because Mn and Cu atoms have similar size and Mn and Cu have large neutron scattering lengths of opposite signs.…”

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confidence: 99%

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Long-range atomic order in irradiated Cu ₈₀ Mn ₂₀

Cussen¹,

Gray²,

Murani³

et al. 2002

Europhys. Lett.

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Abstract. -Atomic short-range order is commonly observed in CuMn alloys via a diffuse (1 1 2 0) peak in neutron diffraction patterns. There has been speculation for many years on the existence and nature of any corresponding long-range order. A sample of Cu80Mn20 has been irradiated in a high fast-neutron flux to produce a large number of crystal defects at around room temperature and thus facilitate the ordering process. Measurements of the diffuse neutron scattering from this sample demonstrate that long-range order has been induced in the sample, as evidenced by at least five Bragg peaks. This order is not seen in a reference sample prepared in identical fashion except for the irradiation. The Cowley short-range order parameters for both samples are calculated and a candidate structure for the long-range order is proposed.Introduction. -CuMn alloys display a rich variety of magnetic behaviours and have stimulated interest since the 1930s. Most interest has centred on the γ-phase, a disordered face-centred cubic lattice with a one atom basis, which can be retained at room temperature over a very wide concentration range. A large part of the interest in CuMn has been in the atomic short-range order (ASRO) and accompanying magnetic short-range order shown to be present in the system by many neutron scattering experiments, e.g. [1][2][3]. CuMn alloys are ideal candidates for neutron scattering studies of short-range order because Mn and Cu atoms have similar size and Mn and Cu have large neutron scattering lengths of opposite signs. Short-range order is evidenced by strong diffuse peaks around (h

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