Nanoscale magnetic phase competition throughout the 
Ni50−xCoxMn40Sn10
 phase diagram: Insights from small-angle neutron scattering

The magnetic phase diagram of slightly overdoped La 2-x Sr x CuO 4 (x=0.17) is characterised by a field-induced hexagonal to square transition of the vortex lattice at low fields (~ 0.4 Tesla) [R. Gilardi et al., Phys. Rev. Lett.88, 217003 (2002)]. Here we report on a small angle neutron scattering study of the vortex lattice at higher fields, that reveals no further change of the coordination of the square vortex lattice up to 10.5 Tesla applied perpendicular to the CuO 2 planes. Moreover, it is found that the diffraction signal disappears at temperatures well below Tc, due to the melting of the vortex lattice.

Download Full-text

Magnetic phase transition in disordered Fe-Ni alloys studied by means of small-angle neutron scattering and three-dimensional analysis of the neutron depolarization

Physical Review B ◽

10.1103/physrevb.64.094426 ◽

2001 ◽

Vol 64 (9) ◽

Cited By ~ 12

Author(s):

S. V. Grigoriev ◽

S. A. Klimko ◽

W. H. Kraan ◽

S. V. Maleyev ◽

A. I. Okorokov ◽

...

Keyword(s):

Phase Transition ◽

Neutron Scattering ◽

Dimensional Analysis ◽

Magnetic Phase Transition ◽

Small Angle ◽

Small Angle Neutron Scattering ◽

Magnetic Phase ◽

Three Dimensional ◽

Ni Alloys ◽

Neutron Depolarization

Download Full-text

Structural properties of a phosphatidylcholine-cholesterol system as studied by small-angle neutron scattering: ripple structure and phase diagram

Biochimica et Biophysica Acta (BBA) - Biomembranes ◽

10.1016/0005-2736(88)90485-3 ◽

1988 ◽

Vol 945 (2) ◽

pp. 221-245 ◽

Cited By ~ 87

Author(s):

Kell Mortensen ◽

Walter Pfeiffer ◽

Erich Sackmann ◽

Wolfgang Knoll

Keyword(s):

Phase Diagram ◽

Neutron Scattering ◽

Structural Properties ◽

Small Angle ◽

Small Angle Neutron Scattering ◽

Ripple Structure

Download Full-text

Studies on the Excess Free Energy and The Early Spinodal Decomposition of the Blend d-PS/Peavrmley Asntda tteh Eof Isotopic Blend d-PS/PS with Small Angle Neutron Scattering

MRS Proceedings ◽

10.1557/proc-171-261 ◽

1989 ◽

Vol 171 ◽

Author(s):

D. Schwahn ◽

T. Springer ◽

K. Hahn ◽

J. Streib

Keyword(s):

Phase Diagram ◽

Free Energy ◽

Neutron Scattering ◽

Spinodal Decomposition ◽

Temperature Region ◽

Small Angle ◽

Small Angle Neutron Scattering ◽

Excess Free Energy ◽

Relaxation Rates ◽

Early States

The article deals with the phase diagram and spinodal decomposition of two polymers blends, namely d—PS/PVME and d(deutero)—PS/PS, investigated by small angle neutron scattering (SANS). The result of the static experiments is the excess free energy and the phase diagram. This is used as a basis for studies of non—equilibrium phenomena as spinodal decomposition. In polymer blends the Cahn—Hilliard—Cook theory of the early state of spinodal decomposition can be tested easily, because the blends have rather low relaxation rates; and they are meanfield systems [2,6] which makes interpretation simple, except in a very narrow temperature region near the critical point [6]. The kinetics in the isotopic blend d—PS/PS are so slow that the early states of spinodal decomposition can be studied within minutes. The presented SANS results have been performed at the KWS I small angle instrument at the FRJ—2 reactor in the KFA Jülich.

Download Full-text