Magnetism, antiferromagnetism ferromagnetism

In the preceding section, the magnetic field was mainly used to determine the saturation magnetization of ferromagnets. However, it is now well established that many actinide compounds have complex magnetic behaviour and the application of an external field may change or suppress antiferromagnetic structures. 

V.M. Fridman, Investigation of antiferromagnetic-ferromagnetic state transition in FeCC>3, induced by a magnetic field. Thesis, Institute for Low Temperature Physics, Kharkov, 1971. 

Fig. 13 Schematic ground-state phase diagram for the spin-1/2 XXZ model in the magnetic field in one [115] and two dimensions [119]. The line of A = 0 corresponds to the half-filling in the Holstein model. Antiferromagnetic, ferromagnetic, and XY phases correspond, respectively, to charge density wave, band insulating, and superconducting states in the Holstein model...

With the exception of lattice defects and semiconducting materials, these will not be discussed further here. In Section 20.8, we introduced some concepts of magnetism including ferromagnetism, antiferromagnetism and ferrimag-netism although these properties are important in materials chemistry, it is beyond the scope of this book to take this topic further. 

Characteristics of some local-moment magnets T, lattice-Kondo temperature a-T , f-T , antiferromagnetic, ferromagnetic ordering temperatures y(2T ) and y(T—>0), Sommerfeld coefficients in the paramagnetic and magnetically ordered phases averaged ordered moment per f-ion,... 

Which type of magnetic material cannot be used to make permanent magnets, a ferromagnetic substance, an antiferromagnetic substance, or a ferrimagnetic substance ... 

Figure 3. Non-magnetic (NM), ferromagnetic (FM), antiferromagnetic single-layer (AFMl) and antiferromagnetic double iayer (AFMD) states of iron included in caiculations of totai energy profiles along tetragonal deformation paths.

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