Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts

Details Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts

2008-02-12

arxiv.org/abs/0802.1595v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1209/0295-5075/83/17010

We study here, both experimentally and theoretically, the anisotropy of magnetoresistance in atomic contacts. Our measurements on iron break junctions reveal an abrupt and hysteretic switch between two conductance levels when a large applied field is continuously rotated. We show that this behaviour stems from the coexistence of two metastable electronic states which result from the anisotropy of electronic interactions responsible for the enhancement of orbital magnetization. In both states giant orbital moments appear on the low coordinated central atom in a realistic contact geometry. However they differ by their orientation, parallel or perpendicular, with respect to the axis of the contact. Our explanation is totally at variance with the usual model based on the band structure of a monatomic linear chain, which we argue cannot be applied to 3d ferromagnetic metals.

Affiliated with

Also associated with

No associations

Rating

Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Giant orbital moments are responsible for the anisotropic magnetoresistance of atomic contacts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-108105