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Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique
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| Zeitschriftentitel: | AIP Advances |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | AIP Advances, 8, 2018, 5 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
AIP Publishing
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| Schlagwörter: |
| author_facet |
Kobayashi, Satoru Sato, Takuma Li, Zhang Dong, Xing-Long Murakami, Takeshi Kobayashi, Satoru Sato, Takuma Li, Zhang Dong, Xing-Long Murakami, Takeshi |
|---|---|
| author |
Kobayashi, Satoru Sato, Takuma Li, Zhang Dong, Xing-Long Murakami, Takeshi |
| spellingShingle |
Kobayashi, Satoru Sato, Takuma Li, Zhang Dong, Xing-Long Murakami, Takeshi AIP Advances Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique General Physics and Astronomy |
| author_sort |
kobayashi, satoru |
| spelling |
Kobayashi, Satoru Sato, Takuma Li, Zhang Dong, Xing-Long Murakami, Takeshi 2158-3226 AIP Publishing General Physics and Astronomy http://dx.doi.org/10.1063/1.5007214 <jats:p>We report results of magnetic hysteresis scaling of minor loops for cobalt nanoparticles with variable mean particle size of 53 and 95 nm. A power-law scaling with an exponent of 1.40±0.05 was found to hold true between minor-loop remanence and hysteresis loss in the wide temperature range of 10 − 300 K, irrespective of particle size and cooling field. A coefficient deduced from the scaling law steeply increases with decreasing temperature and exhibits a cooling field dependence below T ∼ 150 K. The value obtained after field cooling at 5 T was lower than that after zero-field cooling, being opposite to a behavior of major-loop coercivity. These observations were explained from the viewpoint of the exchange coupling between ferromagnetic Co core and antiferromagnetic CoO shell, which becomes effective below T ∼ 150 K.</jats:p> Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique AIP Advances |
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| title |
Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_unstemmed |
Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_full |
Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_fullStr |
Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_full_unstemmed |
Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_short |
Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_sort |
magnetization reversal mechanism for co nanoparticles revealed by a magnetic hysteresis scaling technique |
| topic |
General Physics and Astronomy |
| url |
http://dx.doi.org/10.1063/1.5007214 |
| publishDate |
2018 |
| physical |
|
| description |
<jats:p>We report results of magnetic hysteresis scaling of minor loops for cobalt nanoparticles with variable mean particle size of 53 and 95 nm. A power-law scaling with an exponent of 1.40±0.05 was found to hold true between minor-loop remanence and hysteresis loss in the wide temperature range of 10 − 300 K, irrespective of particle size and cooling field. A coefficient deduced from the scaling law steeply increases with decreasing temperature and exhibits a cooling field dependence below T ∼ 150 K. The value obtained after field cooling at 5 T was lower than that after zero-field cooling, being opposite to a behavior of major-loop coercivity. These observations were explained from the viewpoint of the exchange coupling between ferromagnetic Co core and antiferromagnetic CoO shell, which becomes effective below T ∼ 150 K.</jats:p> |
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| author | Kobayashi, Satoru, Sato, Takuma, Li, Zhang, Dong, Xing-Long, Murakami, Takeshi |
| author_facet | Kobayashi, Satoru, Sato, Takuma, Li, Zhang, Dong, Xing-Long, Murakami, Takeshi, Kobayashi, Satoru, Sato, Takuma, Li, Zhang, Dong, Xing-Long, Murakami, Takeshi |
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| description | <jats:p>We report results of magnetic hysteresis scaling of minor loops for cobalt nanoparticles with variable mean particle size of 53 and 95 nm. A power-law scaling with an exponent of 1.40±0.05 was found to hold true between minor-loop remanence and hysteresis loss in the wide temperature range of 10 − 300 K, irrespective of particle size and cooling field. A coefficient deduced from the scaling law steeply increases with decreasing temperature and exhibits a cooling field dependence below T ∼ 150 K. The value obtained after field cooling at 5 T was lower than that after zero-field cooling, being opposite to a behavior of major-loop coercivity. These observations were explained from the viewpoint of the exchange coupling between ferromagnetic Co core and antiferromagnetic CoO shell, which becomes effective below T ∼ 150 K.</jats:p> |
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| imprint_str_mv | AIP Publishing, 2018 |
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| source_id | 49 |
| spelling | Kobayashi, Satoru Sato, Takuma Li, Zhang Dong, Xing-Long Murakami, Takeshi 2158-3226 AIP Publishing General Physics and Astronomy http://dx.doi.org/10.1063/1.5007214 <jats:p>We report results of magnetic hysteresis scaling of minor loops for cobalt nanoparticles with variable mean particle size of 53 and 95 nm. A power-law scaling with an exponent of 1.40±0.05 was found to hold true between minor-loop remanence and hysteresis loss in the wide temperature range of 10 − 300 K, irrespective of particle size and cooling field. A coefficient deduced from the scaling law steeply increases with decreasing temperature and exhibits a cooling field dependence below T ∼ 150 K. The value obtained after field cooling at 5 T was lower than that after zero-field cooling, being opposite to a behavior of major-loop coercivity. These observations were explained from the viewpoint of the exchange coupling between ferromagnetic Co core and antiferromagnetic CoO shell, which becomes effective below T ∼ 150 K.</jats:p> Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique AIP Advances |
| spellingShingle | Kobayashi, Satoru, Sato, Takuma, Li, Zhang, Dong, Xing-Long, Murakami, Takeshi, AIP Advances, Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique, General Physics and Astronomy |
| title | Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_full | Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_fullStr | Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_full_unstemmed | Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_short | Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_sort | magnetization reversal mechanism for co nanoparticles revealed by a magnetic hysteresis scaling technique |
| title_unstemmed | Magnetization reversal mechanism for Co nanoparticles revealed by a magnetic hysteresis scaling technique |
| topic | General Physics and Astronomy |
| url | http://dx.doi.org/10.1063/1.5007214 |