PT  - JOURNAL ARTICLE
AU  - Uchida, Masaya
AU  - Onose, Yoshinori
AU  - Matsui, Yoshio
AU  - Tokura, Yoshinori
TI  - Real-Space Observation of Helical Spin Order
AID  - 10.1126/science.1120639
DP  - 2006 Jan 20
TA  - Science
PG  - 359--361
VI  - 311
IP  - 5759
4099  - http://science.sciencemag.org/content/311/5759/359.short
4100  - http://science.sciencemag.org/content/311/5759/359.full
SO  - Science2006 Jan 20; 311
AB  - Helical spin order in magnetic materials has been investigated only in reciprocal space. We visualized the helical spin order and dynamics in a metal silicide in real space by means of Lorentz electron microscopy. The real space of the helical spin order proves to be much richer than that expected from the averaged structure; it exhibits a variety of magnetic defects similar to atomic dislocations in the crystal lattice. The application of magnetic fields allows us to directly observe the deformation processes of the helical spin order accompanied by nucleation, movement, and annihilation of the magnetic defects.