Magnetic small-angle scattering from Cu-17 at.% Mn

Schönfeld, B.; Paris, Oskar; Kostorz, G.; Pedersen, Jan Skov

doi:10.1088/0953-8984/10/37/024

Cited by 13 publications

(11 citation statements)

References 19 publications

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“…The present result is corroborated by the previous SANS investigation of Schönfeld and co-workers 9 where no azimuthal dependence was observed for a crystal orientation of lower symmetry neutrons were incident along the cylinder axis that was about 10°off 111 ). The scattering intensities of the former study Fig.…”

Section: Small-angle Neutron Scatteringsupporting

confidence: 91%

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Analytical behavior of short-range order scattering of Cu-rich Cu-Mn near theΓpoint

et al. 2002

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Small-angle neutron scattering with scattering vectors in the range of 0.01 to 0.17 reciprocal lattice units was measured for a single crystal of Cu-17.2 at.% Mn aged at 483 K. At large scattering vectors, a directional dependence of the scattering intensity is observed, with slightly higher values along 100 than along 110. The difference in intensities continuously decreases with decreasing scattering vector. The present data contradict the results of a previous synchrotron radiation study where it was concluded that short-range order scattering is nonanalytical at the point. The discrepancy is traced back to multiple Bragg scattering with high-energy x rays.

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Section: Small-angle Neutron Scatteringsupporting

confidence: 91%

“…Previously, this sample had been used in a wide-angle diffuse scattering experiment of Roelofs and co-workers 8 and in a small-angle neutron scattering experiment of Schönfeld and co-workers. 9 From this cylindrically shaped sample, a slice with a 100 surface normal, 3 mm in thickness and about 9 mm in diameter, was cut by spark erosion.…”

Section: Methodsmentioning

confidence: 99%

Analytical behavior of short-range order scattering of Cu-rich Cu-Mn near theΓpoint

et al. 2002

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“…As such, the SANS method complements microscopy techniques such as Kerr, Lorentz, 2 magnetic-force, 3 ͑spin-polarized͒ scanning tunneling microscopy, 4,5 or photoelectron microscopy, 6 which are able to image the spin microstructure at surfaces and with a resolution which extends from macroscopic dimensions down to the atomic scale. The range of magnetic materials to which the technique of elastic magnetic SANS has been applied includes, for example, ferrofluids, [7][8][9][10][11][12][13] nanoparticles and precipitates, [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] magnetic recording media, [29][30][31][32] collosal magnetoresistance materials, [33][34][35] spin glasses, [36][37][38][39][40][41] Invar alloys, 42,43 single crystals, [44][45][46] molten elemental ferromagnets, 47 precipitates in steels,…”

Section: Introductionmentioning

confidence: 99%

Dipolar correlations in a nanocomposite: A neutron scattering study of NanopermFe89Zr7B3Cu

et al. 2006

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We present results for the magnetic-field, temperature, and neutron-polarization dependence of the smallangle neutron scattering intensity in the soft magnetic iron-based nanocomposite Nanoperm ͑Fe 89 Zr 7 B 3 Cu͒. An unusual "clover-leaf-shaped" intensity distribution on the detector is attributed to the dipolar stray fields around the nanosized iron particles, which are embedded in an amorphous magnetic matrix of lesser saturation magnetization. The dipole field induces spin disorder, correlating the spin misalignment of neighboring particles and matrix over several particle spacings. The cloverleaf shaped anisotropy is observed over a wide range of applied magnetic field and momentum transfer. It persists up to several hundred degrees Kelvin above the Curie temperature of the matrix phase, indicating that some degree of magnetic coupling persists even when the matrix is paramagnetic.

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“…A similar type of anisotropy, causing shifted hysteresis loops, occurs in certain dilute magnetic alloys, and has been extensively investigated in Cu(Mn) alloys of different manganese concentration 7 8 9 10 11 12 13 . Atomic short range order 14 and induced inhomogeneity may affect the hysteresis behavior of Cu(Mn) alloys as demonstrated by Monod et al in Figure 8 of Ref. [ 10 ] by measurements on a cold worked sample.…”

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confidence: 99%

Tunable exchange bias in dilute magnetic alloys – chiral spin glasses

Heinrich

Mathieu

Nordblad

2016

Sci Rep

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A unidirectional anisotropy appears in field cooled samples of dilute magnetic alloys at temperatures well below the cusp temperature of the zero field cooled magnetization curve. Magnetization measurements on a Cu(13.5 at% Mn) sample show that this anisotropy is essentially temperature independent and acts on a temperature dependent excess magnetization, ΔM. The anisotropy can be partially or fully transferred from being locked to the direction of the cooling field at lower fields to becoming locked to the direction of ΔM at larger fields, thus instead appearing as a uniaxial anisotropy. This introduces a deceiving division of the anisotropy into a superposition of a unidirectional and a uniaxial part. This two faced nature of the anisotropy has been empirically scrutinized and concluded to originate from one and the same exchange mechanism: the Dzyaloshinsky-Moriya interaction.

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Magnetic small-angle scattering from Cu-17 at.% Mn

Cited by 13 publications

References 19 publications

Analytical behavior of short-range order scattering of Cu-rich Cu-Mn near theΓpoint

Analytical behavior of short-range order scattering of Cu-rich Cu-Mn near theΓpoint

Dipolar correlations in a nanocomposite: A neutron scattering study of NanopermFe89Zr7B3Cu

Tunable exchange bias in dilute magnetic alloys – chiral spin glasses

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