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Title: Annihilation of domain walls in a ferromagnetic wire

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1360869
Grant/Contract Number:
FG02-08ER46544
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 18; Related Information: CHORUS Timestamp: 2017-05-30 22:18:26; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Ghosh, Anirban, Huang, Kevin S., and Tchernyshyov, Oleg. Annihilation of domain walls in a ferromagnetic wire. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.180408.
Ghosh, Anirban, Huang, Kevin S., & Tchernyshyov, Oleg. Annihilation of domain walls in a ferromagnetic wire. United States. doi:10.1103/PhysRevB.95.180408.
Ghosh, Anirban, Huang, Kevin S., and Tchernyshyov, Oleg. 2017. "Annihilation of domain walls in a ferromagnetic wire". United States. doi:10.1103/PhysRevB.95.180408.
@article{osti_1360869,
title = {Annihilation of domain walls in a ferromagnetic wire},
author = {Ghosh, Anirban and Huang, Kevin S. and Tchernyshyov, Oleg},
abstractNote = {},
doi = {10.1103/PhysRevB.95.180408},
journal = {Physical Review B},
number = 18,
volume = 95,
place = {United States},
year = 2017,
month = 5
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 30, 2018
Publisher's Accepted Manuscript

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  • New materials with high magnetic anisotropy will have domains separated by ultra-narrow ferromagnetic walls with widths on the order of a few unit cells, approaching the limit where the elastic continuum approximation often used in micromagnetic simulations is accurate. The limits of this approximation are explored, and the static and dynamic interactions with intrinsic crystalline defects and external driving elds are modeled. The results developed here will be important when considering the stability of ultra-high-density storage media.
  • The compounds HoMo/sub 6/S/sub 8/ and (Er/sub 1-x/Sn/sub x/)Er/sub 4/Rh/sub 6/Sn/sub 18/ (respectively, Ho-Mo-S and Er-Rh-Sn in the following) are known to be reentrant superconductors, the superconductivity being destroyed by the onset of long-range ferromagnetic order at low temperature. For the first time, the percolation of domain ''walls'' superconductivity has been produced below 0.2 K in Ho-Mo-S single crystals, confirming a systematic study of sintered samples and theoretical expectations. In addition, the ac susceptibility of Er-Rh-Sn single crystals, measured below 0.5 K, is large and positive for large ac fields and nearly equal to -1/4..pi.. for low ac fields. Thismore » fact confirms the existence of superconducting domain ''walls'' which screen the ac field.« less
  • We discuss entanglement in the spin-1/2 anisotropic ferromagnetic Heisenberg chain in the presence of a boundary magnetic field generating domain walls. By increasing the magnetic field, the model undergoes a first-order quantum phase transition from a ferromagnetic to a kink-type phase, which is associated to a jump in the content of entanglement available in the system. Above the critical point, pairwise entanglement is shown to be nonvanishing and independent of the boundary magnetic field for large chains. Based on this result, we provide an analytical expression for the entanglement between arbitrary spins. Moreover, the effects of the quantum domains onmore » the gapless region and for antiferromagnetic anisotropy are numerically analyzed. Finally multiparticle entanglement properties are considered, from which we establish a characterization of the critical anisotropy separating the gapless regime from the kink-type phase.« less