Intrinsic hysteresis due to the surface barrier for chiral solitons in monoaxial chiral helimagnets

We present a theory of a surface barrier for isolated solitons to enter chiral magnets, in an analogous way to that of the Bean-Livingston barrier in the type II superconductors. With this theory, we discuss hysteresis observed in magnetoresistance (MR) measurements of monoaxial chiral helimagnet Cr...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2018-06, Vol.97 (21), Article 214413
Main Authors: Shinozaki, M., Masaki, Y., Aoki, R., Togawa, Y., Kato, Y.
Format: Article
Language:English
Subjects:
Barriers
Critical field (superconductivity)
Hysteresis
Magnetoresistance
Magnetoresistivity
Magnets
Solitary waves
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a theory of a surface barrier for isolated solitons to enter chiral magnets, in an analogous way to that of the Bean-Livingston barrier in the type II superconductors. With this theory, we discuss hysteresis observed in magnetoresistance (MR) measurements of monoaxial chiral helimagnet CrNb3S6. We argue that a large jump in the decreasing field process of MR of micrometer-sized samples is due to the disappearance of the surface barrier for the chiral soliton at a field H=Hb. This argument is justified through agreement between the experimental results at 10 K and our theoretical result Hb/Hc=4/π2∼0.4 (with thermodynamic critical field Hc) based on the sine-Gordon model.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.97.214413