Published October 1, 2006 | Version v1
Journal article Metadata-only

Dipolar correlations in a nanocomposite: A neutron scattering study of Nanoperm Fe89Zr7B3Cu

Creators

  • 1. Institut fuer Nanotechnologie, Forschungszentrum Karlsruhe, Karlsruhe, Germany and Technische Physik, Universitaet des Saarlandes, Saarbruecken (Germany)
  • 2. Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland)
  • 3. GKSS Research Center, Geesthacht (Germany)
  • 4. Department of Materials Engineering, Monash University, Melbourne (Australia)
  • 5. CNR-INFM S3 National Research Center, Physics Department, University of Modena and Reggio Emilia (Italy)
  • 6. Technische Physik, Universitaet des Saarlandes, Saarbruecken (Germany)

Description

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 (Fe89Zr7B3Cu). 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

Additional details

Identifiers

DOI
10.1103/PhysRevB.74.134407;

Publishing Information

Journal Title
Physical Review. B, Condensed Matter and Materials Physics
Journal Volume
74
Journal Issue
13
Journal Page Range
p. 134407-134407.13
ISSN
1098-0121

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38026729
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
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
Descriptors DEC
ALLOYS; ANGULAR MOMENTUM; COHERENT SCATTERING; DIFFRACTION; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; INTERACTIONS; LEPTONS; MAGNETIC MATERIALS; MAGNETISM; MATERIALS; METALS; MULTIPOLES; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; SCATTERING; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS; TRANSITION TEMPERATURE

Optional Information

Notes
(c) 2006 The American Physical Society