Matias URDAMPILLETA - TEL

tel-00770488, version 1 - 7 Jan 2013
Classical world Mesoscopic world Quantum world
Permanent magnet Nanoparticle SMM Nuclear spin
105 104 103 102 10 10
20 10-3 µ B
Multi-domains Mono-domain Individual spin
Nucleation, propagation and
annihilation od domain walls
Uniform rotation Quantum tunneling of the magnetization
M/M S
1
0
- 1
-40 -20 0 2 0 4 0
µ 0H(mT)
M/M S
1
0
- 1
-100 0 100
µ 0H(mT)
M/M S
1
0
- 1
Fe 8
1K
0.7K
0.1K
- 1 0 1
µ 0H(T)
8