Critical Temperatures of the Random Heisenberg-Ising Magnets Amorphous Magnets and Spin Glasses in the Binary Mixtures

1980 ◽  
Vol 97 (2) ◽  
pp. 663-672 ◽  
Author(s):  
S. Katsura ◽  
K. Shimada
Keyword(s):  
Binary Mixtures ◽  
Spin Glasses ◽  
Critical Temperatures ◽  
Ising Magnets ◽  
Amorphous Magnets

Magnetic Sans of Nanoparticles and Complex Systems

2021 ◽  
pp. 172-222
Author(s):  
Andreas Michels
Keyword(s):  
Boundary Value Problem ◽  
Complex Systems ◽  
Spin Glasses ◽  
Boundary Value ◽  
Vortex State ◽  
Amorphous Magnets ◽  
Analytical Expressions ◽  
Complete Specification

This chapter provides an overview on the magnetic SANS of nanoparticles and complex systems, which include ferrofluids, magnetic steels, and spin glasses and amorphous magnets. The underlying assumptions of the conventional particle-matrix-based model of magnetic SANS, which assumes uniformly magnetized domains, characteristic e.g., for superparamagnets, are discussed and we provide a complete specification of the micromagnetic boundary-value problem. First attempts to provide analytical expressions for the vortex-state-related magnetic SANS of thin circular discs are considered.

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