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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kharel, P. Shah, V.R. Skomski, R. Shield, J.E. Sellmyer, D.J. |
| Copyright Year | 1965 |
| Abstract | Nanostructured MnBi ribbons doped with impurity elements including B, C, Fe, Hf, Sm and Tb were prepared using the arc melting and melt-spinning techniques. The melt-spun ribbons were annealed in vacuum furnace at 350°C to obtain the intended hexagonal structure. The external impurity doping made a significant change in the magnetic properties of the nanostructured MnBi ribbons including a decrease in saturation magnetization (Ms) and anisotropy energy (K) and an increase in coercivity (Hc). However, Hf and C co-doping showed the opposite effect with a small increase in both Ma and K. Interestingly, the anisotropy energy of the boron doped sample increased by about 15% irrespective of the small decrease in magnetization. A significant increase in Hc of MnBi ribbons was found due to Hf, Tb and Sm doping. Hc as high as 13 kOe was achieved in Hf-doped sample after the sample was aligned in a magnetic field. A thermal hysteresis was observed at the structural phase transition of MnBi, which shifts by about 5 K towards higher temperatures due to impurity doping. The observed magnetic properties of the impurity doped MnBi ribbons are explained as the consequences of the disorder and the competing ferromagnetic and antiferromagnetic interactions. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 3318 |
| Ending Page | 3321 |
| Page Count | 4 |
| File Size | 688739 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 49 |
| Issue Number | 7 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-07-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Magnetic anisotropy Saturation magnetization Doping Anisotropic magnetoresistance Magnetic hysteresis Hafnium Impurities permanent magnet melt-spun ribbons |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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