Abstract
We present small angle neutron scattering (SANS) data collected on polycrystalline Ni1−xVx samples with x ≥ 0.10 with confirmed random atomic distribution. We aim to determine the relevant length scales of magnetic correlations in ferromagnetic samples with low critical temperatures Tc that show signs of magnetic inhomogeneities in magnetization and μSR data. The SANS study reveals signatures of long-range order and coexistence of short-range magnetic correlations in this randomly disordered ferromagnetic alloy. We show the advantages of a polarization analysis in identifying the main magnetic contributions from the dominating nuclear scattering.
Highlights
Revealed a clear temperature-dependent signal in weak ferromagnetic samples with x ≤ 0.1113 that demonstrated that magnetic scattering can be resolved for ferromagnetic samples with a reduced average moment per Ni of μ ≈ 0.03 μB.5 We show here the small angle neutron scattering (SANS) data for x = 0.10 with Tc ≈ 50 K collected at NIST to compare best full pol and non pol data
small angle neutron scattering (SANS) data collected at NG7SANS, NIST and GPSANS, ORNL revealed a clear temperature-dependent signal in weak ferromagnetic samples with x ≤ 0.1113 that demonstrated that magnetic scattering can be resolved for ferromagnetic samples with a reduced average moment per Ni of μ ≈ 0.03 μB.5 We show here the SANS data for x = 0.10 with Tc ≈ 50 K collected at NIST to compare best full pol and non pol data
In this study we focus on the binary transition metal alloy
Summary
Revealed a clear temperature-dependent signal in weak ferromagnetic samples with x ≤ 0.1113 that demonstrated that magnetic scattering can be resolved for ferromagnetic samples with a reduced average moment per Ni of μ ≈ 0.03 μB.5 We show here the SANS data for x = 0.10 with Tc ≈ 50 K collected at NIST to compare best full pol and non pol data. The clear advantage is the collection of pure spin flip (SF) data (DU+UD) recognizing electronic magnetic scattering through the angle θ dependence8 at constant Q.
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