Reference : Dipolar correlations in a nanocomposite: A neutron scattering study of Nanoperm Fe89Z...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/586
Dipolar correlations in a nanocomposite: A neutron scattering study of Nanoperm Fe89Zr7B3Cu
English
Michels, Andreas mailto [Technische Physik, Universität des Saarlandes, Germany]
Vecchini, C. [Physics Department, University of Modena and Reggio Emilia, Italy]
Moze, O. [Physics Department, University of Modena and Reggio Emilia, Italy]
Suzuki, K. [Department of Materials Engineering, Monash University, Australia]
Pranzas, P. K. [GKSS Research Center, Geesthacht, Germany]
Kohlbrecher, J. [Paul Scherrer Institute, Switzerland]
Weissmüller, J. [Technische Physik, Universität des Saarlandes, Germany]
2006
Physical Review. B, Condensed Matter and Materials Physics
American Physical Society
74
13
1344071-13440713
Yes (verified by ORBilu)
1098-0121
1550-235X
Woodbury
NY
[en] 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.
http://hdl.handle.net/10993/586
10.1103/PhysRevB.74.134407

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