Magnetic domain structure of nanocrystalline Zr18-xHf xCo82 ribbons

Effect of Hf

Lanping Yue, I. A. Al-Omari, Wenyong Zhang, Ralph Skomski, D. J. Sellmyer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The effect of Hf on the permanent magnetism of nanocrystalline Zr18-xHfxCo82 ribbons (x = 0, 2, 4, and 6) was investigated by magnetic properties measurement and magnetic force microscopy (MFM). Emphasis is on the local magnetic domain structures in polycrystalline rapidly solidified Zr18-xHfxCo82 ribbons for four different samples with small fractions of Hf dopants (x ≤ 6). The investigation of the magnetic properties of the Zr18-xHfxCo82 ribbons revealed that all the samples under investigation are ferromagnetic at room temperature, and the corresponding MFM images show bright and dark contrast patterns with up-down magnetic domain structures. It is found that the saturation magnetization and the coercivity depend on Hf doping concentration x in the samples. For a sample with Hf concentration x = 4, the maximum energy product (BH)max value is 3.7 MGOe. The short magnetic correlation length of 131 nm and smallest root-mean-square phase shift value of 0.68 0 were observed for x = 4, which suggests the refinement of the magnetic domain structure due to weak intergranular exchange coupling in this sample. The above results indicate that suitable Hf addition is helpful for the magnetic domain structure refinement, the coecivity enhancement, and the energy-product improvement of this class of rare-earth-free nanocrystalline permanent-magnet materials.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherMaterials Research Society
Volume1557
DOIs
Publication statusPublished - 2013
Event2013 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 1 2013Apr 5 2013

Other

Other2013 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/1/134/5/13

Fingerprint

Magnetic domains
magnetic domains
ribbons
Magnetic force microscopy
magnetic force microscopy
Magnetic properties
Doping (additives)
Exchange coupling
magnetic properties
Magnetism
Saturation magnetization
Coercive force
Phase shift
Rare earths
Permanent magnets
products
permanent magnets
coercivity
phase shift
rare earth elements

Keywords

  • magnetic properties
  • nanostructure
  • scanning probe microscopy (SPM)

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Yue, L., Al-Omari, I. A., Zhang, W., Skomski, R., & Sellmyer, D. J. (2013). Magnetic domain structure of nanocrystalline Zr18-xHf xCo82 ribbons: Effect of Hf. In Materials Research Society Symposium Proceedings (Vol. 1557). Materials Research Society. https://doi.org/10.1557/opl.2013.1105

Magnetic domain structure of nanocrystalline Zr18-xHf xCo82 ribbons : Effect of Hf. / Yue, Lanping; Al-Omari, I. A.; Zhang, Wenyong; Skomski, Ralph; Sellmyer, D. J.

Materials Research Society Symposium Proceedings. Vol. 1557 Materials Research Society, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yue, L, Al-Omari, IA, Zhang, W, Skomski, R & Sellmyer, DJ 2013, Magnetic domain structure of nanocrystalline Zr18-xHf xCo82 ribbons: Effect of Hf. in Materials Research Society Symposium Proceedings. vol. 1557, Materials Research Society, 2013 MRS Spring Meeting, San Francisco, CA, United States, 4/1/13. https://doi.org/10.1557/opl.2013.1105
Yue L, Al-Omari IA, Zhang W, Skomski R, Sellmyer DJ. Magnetic domain structure of nanocrystalline Zr18-xHf xCo82 ribbons: Effect of Hf. In Materials Research Society Symposium Proceedings. Vol. 1557. Materials Research Society. 2013 https://doi.org/10.1557/opl.2013.1105
Yue, Lanping ; Al-Omari, I. A. ; Zhang, Wenyong ; Skomski, Ralph ; Sellmyer, D. J. / Magnetic domain structure of nanocrystalline Zr18-xHf xCo82 ribbons : Effect of Hf. Materials Research Society Symposium Proceedings. Vol. 1557 Materials Research Society, 2013.
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