Gölden, Dominik ; Zhang, Hongbin ; Radulov, Iliya ; Dirba, Imants ; Komissinskiy, Philipp ; Hildebrandt, Erwin ; Alff, Lambert (2018)
Evolution of anisotropy in bcc Fe distorted by interstitial boron.
In: Physical Review B, 97 (1)
doi: 10.1103/PhysRevB.97.014411
Article, Bibliographie
Abstract
The evolution of magnetic anisotropy in bcc Fe as a function of interstitial boron atoms was investigated in thin films grown by molecular beam epitaxy. The thermodynamic nonequilibrium conditions during film growth allowed one to stabilize an interstitial boron content of about 14at.% accompanied by lattice tetragonalization. The c/a ratio scaled linearly with the boron content up to a maximum value of 1.05 at 300∘C substrate growth temperature, with a room-temperature magnetization of. In contrast to nitrogen interstitials, the magnetic easy axis remained in-plane with an anisotropy of approximately −5.1×106erg/cm3. Density functional theory calculations using the measured lattice parameters confirm this value and show that boron local ordering indeed favors in-plane magnetization. Given the increased temperature stability of boron interstitials as compared to nitrogen interstitials, this study will help to find possible ways to manipulate boron interstitials into a more favorable local order.
| Item Type: | Article |
|---|---|
| Erschienen: | 2018 |
| Creators: | Gölden, Dominik ; Zhang, Hongbin ; Radulov, Iliya ; Dirba, Imants ; Komissinskiy, Philipp ; Hildebrandt, Erwin ; Alff, Lambert |
| Type of entry: | Bibliographie |
| Title: | Evolution of anisotropy in bcc Fe distorted by interstitial boron |
| Language: | English |
| Date: | 12 January 2018 |
| Publisher: | APS Publishing |
| Journal or Publication Title: | Physical Review B |
| Volume of the journal: | 97 |
| Issue Number: | 1 |
| DOI: | 10.1103/PhysRevB.97.014411 |
| URL / URN: | https://doi.org/10.1103/PhysRevB.97.014411 |
| Abstract: | The evolution of magnetic anisotropy in bcc Fe as a function of interstitial boron atoms was investigated in thin films grown by molecular beam epitaxy. The thermodynamic nonequilibrium conditions during film growth allowed one to stabilize an interstitial boron content of about 14at.% accompanied by lattice tetragonalization. The c/a ratio scaled linearly with the boron content up to a maximum value of 1.05 at 300∘C substrate growth temperature, with a room-temperature magnetization of. In contrast to nitrogen interstitials, the magnetic easy axis remained in-plane with an anisotropy of approximately −5.1×106erg/cm3. Density functional theory calculations using the measured lattice parameters confirm this value and show that boron local ordering indeed favors in-plane magnetization. Given the increased temperature stability of boron interstitials as compared to nitrogen interstitials, this study will help to find possible ways to manipulate boron interstitials into a more favorable local order. |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology 11 Department of Materials and Earth Sciences > Material Science > Functional Materials 11 Department of Materials and Earth Sciences > Material Science > Theory of Magnetic Materials |
| Date Deposited: | 21 Mar 2018 10:03 |
| Last Modified: | 06 Jul 2018 12:01 |
| PPN: | |
| Funders: | We thank the German federal state of Hessen through its excellence program LOEWE “RESPONSE” for financial support. |
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