Abstract
The effects of reversible hydrogen absorption on the magnetism of Co-Pd alloy thin films were investigated. Evident enhancement of magnetic coercivity Hc and squareness, measured by magneto optical Kerr effect (MOKE), was observed in the magnetic hysteresis loops of films with Pd content of 61%, 76%, and 86%, whereas no observable changes were noted in the MOKE hysteresis loops of Co-rich alloy films. For Co39 Pd61, perpendicular magnetic anisotropy increased as film thickness increased from 10 to 20 nm. Hydrogenation induced three times enhancement of perpendicular Hc for 20 nm Co39 Pd61, whereas the Hc change in 10 nm Co39 Pd61 was within 10%. A Pd-rich alloy composition and appropriate film thickness for perpendicular magnetization are both crucial for hydrogen absorption-induced effect on magnetic properties, i.e. the enhancement of Hc and squareness as well as the reduction of Kerr rotation angle.
| Original language | English |
|---|---|
| Pages (from-to) | 20-26 |
| Number of pages | 7 |
| Journal | Journal of Alloys and Compounds |
| Volume | 661 |
| DOIs | |
| Publication status | Published - 2016 Mar 15 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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Hydrogen absorption-induced reversible change in magnetic properties of Co-Pd alloy films. / Lin, Wen Chin; Wang, Bo-Yao; Huang, Han Yuan; Tsai, Cheng Jui; Mudinepalli, Venkata Ramana.
In: Journal of Alloys and Compounds, Vol. 661, 15.03.2016, p. 20-26.Research output: Contribution to journal › Article
TY - JOUR
T1 - Hydrogen absorption-induced reversible change in magnetic properties of Co-Pd alloy films
AU - Lin, Wen Chin
AU - Wang, Bo-Yao
AU - Huang, Han Yuan
AU - Tsai, Cheng Jui
AU - Mudinepalli, Venkata Ramana
PY - 2016/3/15
Y1 - 2016/3/15
N2 - The effects of reversible hydrogen absorption on the magnetism of Co-Pd alloy thin films were investigated. Evident enhancement of magnetic coercivity Hc and squareness, measured by magneto optical Kerr effect (MOKE), was observed in the magnetic hysteresis loops of films with Pd content of 61%, 76%, and 86%, whereas no observable changes were noted in the MOKE hysteresis loops of Co-rich alloy films. For Co39 Pd61, perpendicular magnetic anisotropy increased as film thickness increased from 10 to 20 nm. Hydrogenation induced three times enhancement of perpendicular Hc for 20 nm Co39 Pd61, whereas the Hc change in 10 nm Co39 Pd61 was within 10%. A Pd-rich alloy composition and appropriate film thickness for perpendicular magnetization are both crucial for hydrogen absorption-induced effect on magnetic properties, i.e. the enhancement of Hc and squareness as well as the reduction of Kerr rotation angle.
AB - The effects of reversible hydrogen absorption on the magnetism of Co-Pd alloy thin films were investigated. Evident enhancement of magnetic coercivity Hc and squareness, measured by magneto optical Kerr effect (MOKE), was observed in the magnetic hysteresis loops of films with Pd content of 61%, 76%, and 86%, whereas no observable changes were noted in the MOKE hysteresis loops of Co-rich alloy films. For Co39 Pd61, perpendicular magnetic anisotropy increased as film thickness increased from 10 to 20 nm. Hydrogenation induced three times enhancement of perpendicular Hc for 20 nm Co39 Pd61, whereas the Hc change in 10 nm Co39 Pd61 was within 10%. A Pd-rich alloy composition and appropriate film thickness for perpendicular magnetization are both crucial for hydrogen absorption-induced effect on magnetic properties, i.e. the enhancement of Hc and squareness as well as the reduction of Kerr rotation angle.
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U2 - 10.1016/j.jallcom.2015.11.144
DO - 10.1016/j.jallcom.2015.11.144
M3 - Article
VL - 661
SP - 20
EP - 26
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -