Abstract
We report an experimental investigation of the magnetoelastic effects of ultrathin antiferromagnets, performed by comparing the characteristic behavior of the induced spin-reorientation transition (SRT) of Co films in two types of epitaxially grown bilayers: face-centered-cubic (fcc)-like Mn/Co (fcc-Mn: a=3.75Å,c=3.76Å) and face-centered-tetragonal (fct)-Mn (a=3.61Å,c=3.78Å). Magnetic hysteresis loops and magnetic domain images indicate that both fcc-Mn and fct-Mn films can produce a (110) to (100) SRT in adjacent Co films when the thickness of the Mn layer is greater than a temperature-dependent critical value. Detailed analysis of the critical thickness of Mn films and the evolution of the Co domain structure upon SRT indicate that the fct-Mn film had a higher antiferromagnetic ordering temperature and stronger lateral Mn-Mn exchange coupling compared with the fcc-Mn film. The enhanced long-range antiferromagnetic ordering emerging concurrently with the in-plane lattice variation of the fcc-like Mn film in Mn/Co bilayers clearly showed the magnetoelastic effect of ultrathin antiferromagnets.
| Original language | English |
|---|---|
| Article number | 224424 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 90 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2014 Dec 29 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers. / Wang, Bo Yao; Hong, Jhen Yong; Jih, Nae Yeou; Ou Yang, Kui Hon; Chen, Li Ren; Lin, Hong Ji; Chan, Yuet Loy; Wei, Der Hsin; Lin, Minn Tsong.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 22, 224424, 29.12.2014.Research output: Contribution to journal › Article
TY - JOUR
T1 - Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers
AU - Wang, Bo Yao
AU - Hong, Jhen Yong
AU - Jih, Nae Yeou
AU - Ou Yang, Kui Hon
AU - Chen, Li Ren
AU - Lin, Hong Ji
AU - Chan, Yuet Loy
AU - Wei, Der Hsin
AU - Lin, Minn Tsong
PY - 2014/12/29
Y1 - 2014/12/29
N2 - We report an experimental investigation of the magnetoelastic effects of ultrathin antiferromagnets, performed by comparing the characteristic behavior of the induced spin-reorientation transition (SRT) of Co films in two types of epitaxially grown bilayers: face-centered-cubic (fcc)-like Mn/Co (fcc-Mn: a=3.75Å,c=3.76Å) and face-centered-tetragonal (fct)-Mn (a=3.61Å,c=3.78Å). Magnetic hysteresis loops and magnetic domain images indicate that both fcc-Mn and fct-Mn films can produce a (110) to (100) SRT in adjacent Co films when the thickness of the Mn layer is greater than a temperature-dependent critical value. Detailed analysis of the critical thickness of Mn films and the evolution of the Co domain structure upon SRT indicate that the fct-Mn film had a higher antiferromagnetic ordering temperature and stronger lateral Mn-Mn exchange coupling compared with the fcc-Mn film. The enhanced long-range antiferromagnetic ordering emerging concurrently with the in-plane lattice variation of the fcc-like Mn film in Mn/Co bilayers clearly showed the magnetoelastic effect of ultrathin antiferromagnets.
AB - We report an experimental investigation of the magnetoelastic effects of ultrathin antiferromagnets, performed by comparing the characteristic behavior of the induced spin-reorientation transition (SRT) of Co films in two types of epitaxially grown bilayers: face-centered-cubic (fcc)-like Mn/Co (fcc-Mn: a=3.75Å,c=3.76Å) and face-centered-tetragonal (fct)-Mn (a=3.61Å,c=3.78Å). Magnetic hysteresis loops and magnetic domain images indicate that both fcc-Mn and fct-Mn films can produce a (110) to (100) SRT in adjacent Co films when the thickness of the Mn layer is greater than a temperature-dependent critical value. Detailed analysis of the critical thickness of Mn films and the evolution of the Co domain structure upon SRT indicate that the fct-Mn film had a higher antiferromagnetic ordering temperature and stronger lateral Mn-Mn exchange coupling compared with the fcc-Mn film. The enhanced long-range antiferromagnetic ordering emerging concurrently with the in-plane lattice variation of the fcc-like Mn film in Mn/Co bilayers clearly showed the magnetoelastic effect of ultrathin antiferromagnets.
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U2 - 10.1103/PhysRevB.90.224424
DO - 10.1103/PhysRevB.90.224424
M3 - Article
AN - SCOPUS:84951075472
VL - 90
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 22
M1 - 224424
ER -