Physics of Magnetism

152 CHAPTER 14. SOFT-MAGNETIC MATERIALS annealing temperatures lead to poor results. That means that large values can only be ge ...

SECTION 14.2. SURVEY OF MATERIALS 153 Soft ferrites. In contradistinction to the hard ferrites discussed in Section 12.7, there ...

154 CHAPTER 14. SOFT-MAGNETIC MATERIALS due to structural relaxation, one has to destroy the domain pattern by means of an exter ...

SECTION 14.2. SURVEY OF MATERIALS 155 Nanocrystalline alloys. Nanocrystalline alloys have a microstructure consisting of ultrafi ...

156 CHAPTER 14. SOFT-MAGNETIC MATERIALS grains is quite substantially reduced by exchange interaction (Herzer, 1989, 1996). The ...

SECTION 14.3. THE RANDOM-ANISOTROPY MODEL 157 As the local magnetocrystalline anisotropies are averaged out this way, the scale ...

158 CHAPTER 14. SOFT-MAGNETIC MATERIALS magnetization direction can be optically distinguished from each other by using plane- p ...

SECTION 14.5. HEAD MATERIALS AND THEIR APPLICATIONS 159 Accordingly, and are seen to pass through a maximum in this grain-size r ...

160 CHAPTER 14. SOFT-MAGNETIC MATERIALS therefore does not employ stationary heads but rotating heads. Heads in modern magnetic ...

SECTION 14.5. HEAD MATERIALS AND THEIR APPLICATIONS 161 eddy currents. To ensure good reliability and a long operating life, the ...

162 CHAPTER 14. SOFT-MAGNETIC MATERIALS thin films are currently indicated as materials giving rise to giant magnetoresistance ( ...

SECTION 14.5. HEAD MATERIALS AND THEIR APPLICATIONS 163 on the instantaneous fields of the media, and hence is independent of th ...

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15 Invar Alloys The origin of thermal expansion is the presence of anharmonic terms in the potential energy expression describin ...

166 CHAPTER 15. INVAR ALLOYS approximation is equal to For this reason, one may also write Eq. (15.3) in the form which suggests ...

CHAPTER 15. INVAR ALLOYS 167 The most conventional treatment of magnetovolume effects is based on a model in which the magnetic ...

168 CHAPTER 15. INVAR ALLOYS figure. It is seen that here the non-magnetic state has the lower energy. Computational results for ...

CHAPTER 15. INVAR ALLOYS 169 surveys of Kaya (1978), Wasserman (1991), and Shiga (1994). The properties of a number of Invar all ...

170 CHAPTER 15. INVAR ALLOYS References Kaya, S. (1978) Physics and application of Invar alloys, Tokyo: Maruzen Co. Kittel, C. ( ...

16 Magnetostrictive Materials Magnetostriction can be defined as the change in dimension of a piece of magnetic material induced ...