Dipolar correlations in a nanocomposite: A neutron scattering study of Nanoperm Fe{sub 89}Zr{sub 7}B{sub 3}Cu

Journal Article · Sun Oct 01 00:00:00 EDT 2006 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.74.134407· OSTI ID:20853739

Michels, A; Vecchini, C; Moze, O; Suzuki, K; Pranzas, P K; Kohlbrecher, J; Weissmueller, J ^[1]

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1. Technische Physik, Universitaet des Saarlandes, Saarbruecken (Germany)

We present results for the magnetic-field, temperature, and neutron-polarization dependence of the small-angle neutron scattering intensity in the soft magnetic iron-based nanocomposite Nanoperm (Fe{sub 89}Zr{sub 7}B{sub 3}Cu). 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 clover-leaf-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.

• OSTI ID: 20853739
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 74, Issue 13; Other Information: DOI: 10.1103/PhysRevB.74.134407; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BORON ALLOYS
COMPOSITE MATERIALS
COPPER ALLOYS
CORRELATIONS
COUPLING
CURIE POINT
DIPOLES
DISTRIBUTION
ELECTRONS
EXCHANGE INTERACTIONS
FERROMAGNETIC MATERIALS
IRON
IRON ALLOYS
MAGNETIC FIELDS
MAGNETIZATION
MOMENTUM TRANSFER
NANOSTRUCTURES
NEUTRON DIFFRACTION
PARAMAGNETISM
PARTICLES
POLARIZATION
SMALL ANGLE SCATTERING
SPIN
ZIRCONIUM ALLOYS