Skip to main content

Condensed Matter > Materials Science

arXiv:1804.05824 (cond-mat)
[Submitted on 16 Apr 2018 (v1), last revised 24 Jul 2018 (this version, v2)]

Title:Anisotropy of exchange stiffness based on atomic-scale magnetic properties in rare-earth permanent magnet Nd$_2$Fe$_{14}$B

Authors:Yuta Toga, Masamichi Nishino, Seiji Miyashita, Takashi Miyake, Akimasa Sakuma
View PDF HTML (experimental)
Abstract:We examine the anisotropic properties of the exchange stiffness constant, $\mathcal{A}$, for rare-earth permanent magnet, Nd$_2$Fe$_{14}$B, by connecting analyses with two different scales of length, i.e., Monte Carlo (MC) method with an atomistic spin model and Landau-Lifshitz-Gilbert (LLG) equation with a continuous magnetic model. The atomistic MC simulations are performed on the spin model of Nd$_2$Fe$_{14}$B constructed from ab-initio calculations, and the LLG micromagnetics simulations are performed with the parameters obtained by the MC simulations. We clarify that the amplitude and the thermal property of $\mathcal{A}$ depend on the orientation in the crystal, which are attributed to the layered structure of Nd atoms and weak exchange couplings between Nd and Fe atoms. We also confirm that the anisotropy of $\mathcal{A}$ significantly affects the threshold field for the magnetization reversal (coercivity) given by the depinning process.
Comments: 11 pages, 10 figures
Subjects: Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:1804.05824 [cond-mat.mtrl-sci]
  (or arXiv:1804.05824v2 [cond-mat.mtrl-sci] for this version)
  https://doi.org/10.48550/arXiv.1804.05824
Journal reference: Phys. Rev. B 98, 054418 (2018)
Related DOI: https://doi.org/10.1103/PhysRevB.98.054418

Submission history

From: Yuta Toga [view email]
[v1] Mon, 16 Apr 2018 17:50:33 UTC (1,124 KB)
[v2] Tue, 24 Jul 2018 09:32:58 UTC (1,232 KB)
Full-text links:

Access Paper:

  • View PDF
  • HTML (experimental)
  • TeX Source
view license

Current browse context:

cond-mat.mtrl-sci
< prev   |   next >
new | recent | 2018-04
Change to browse by:
cond-mat

References & Citations

Bookmark

BibSonomy Reddit

Bibliographic and Citation Tools

Bibliographic Explorer (What is the Explorer?)
Connected Papers (What is Connected Papers?)
Litmaps (What is Litmaps?)
scite Smart Citations (What are Smart Citations?)

Code, Data and Media Associated with this Article

alphaXiv (What is alphaXiv?)
CatalyzeX Code Finder for Papers (What is CatalyzeX?)
DagsHub (What is DagsHub?)
Gotit.pub (What is GotitPub?)
Hugging Face (What is Huggingface?)
ScienceCast (What is ScienceCast?)

Demos

Replicate (What is Replicate?)
Hugging Face Spaces (What is Spaces?)
TXYZ.AI (What is TXYZ.AI?)

Recommenders and Search Tools

Influence Flower (What are Influence Flowers?)
CORE Recommender (What is CORE?)
IArxiv Recommender (What is IArxiv?)

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)