Fundamentals of magnetism
• Diamagnetism
• Paramagnetism
• Ferromagnetism
• Antiferromagnetism
Diamagnetism
• Due to Faraday’s law
AdB
dt
dE
B
B
Paramagnetism
T
CH
M
T
C
Ferromagnetism
Antiferromagnetism
Hysteresis
Magnetic domains
To minimized the magnetostatic energy
32
02
1dxBU
Magnetic Force Microscope (MFM)
Home workdue 12/31/2005
1. Briefly describe the phenomena of diamagnetism, paramagnetism, ferromagnetism, and ferromagnetism. (40%)
2. Why are magnetic domains formed? (20%)
3. Due to which breakthrough does the memory capacity of the hard disks increase so rapidly? (20%)
4. List two possible applications of magnetic nanoparticles. (20%)