The investigation of giant magnetic moment in ultrathin Fe3O4 films
The magnetic and transport properties of Fe3O4 films with a series of thicknesses are investigated. For the films with thickness below 15 nm, the saturation magnetization (Ms) increases and the coercivity decreases with the decrease in films’ thickness. The Ms of 3 nm Fe3O4 film is dramatically incr...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-03-01
|
| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4944590 |
| _version_ | 1818143249757372416 |
|---|---|
| author | Xiaofen Guan Guowei Zhou Wuhong Xue Zhiyong Quan Xiaohong Xu |
| author_facet | Xiaofen Guan Guowei Zhou Wuhong Xue Zhiyong Quan Xiaohong Xu |
| author_sort | Xiaofen Guan |
| collection | DOAJ |
| description | The magnetic and transport properties of Fe3O4 films with a series of thicknesses are investigated. For the films with thickness below 15 nm, the saturation magnetization (Ms) increases and the coercivity decreases with the decrease in films’ thickness. The Ms of 3 nm Fe3O4 film is dramatically increased to 1017 emu/cm3. As for films’ thickness more than 15 nm, Ms is tending to be close to the Fe3O4 bulk value. Furthermore, the Verwey transition temperature (Tv) is visible for all the films, but suppressed for 3 nm film. We also find that the ρ of 3 nm film is the highest of all the films. The suppressed Tv and high ρ may be related to the islands morphology in 3 nm film. To study the structure, magnetic, and transport properties of the Fe3O4 films, we propose that the giant magnetic moment most likely comes from the spin of Fe ions in the tetrahedron site switching parallel to the Fe ions in the octahedron site at the surface, interface, and grain boundaries. The above results are of great significance and also provide a promising future for either device applications or fundamental research. |
| first_indexed | 2024-12-11T11:28:40Z |
| format | Article |
| id | doaj.art-acadee9ef592451085fc43277fe9e731 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-11T11:28:40Z |
| publishDate | 2016-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-acadee9ef592451085fc43277fe9e7312022-12-22T01:08:57ZengAIP Publishing LLCAPL Materials2166-532X2016-03-0143036104036104-610.1063/1.4944590008603APMThe investigation of giant magnetic moment in ultrathin Fe3O4 filmsXiaofen Guan0Guowei Zhou1Wuhong Xue2Zhiyong Quan3Xiaohong Xu4School of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, People’s Republic of ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, People’s Republic of ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, People’s Republic of ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, People’s Republic of ChinaSchool of Chemistry and Materials Science, Key Laboratory of Magnetic Molecules and Magnetic Information Materials, Ministry of Education, Shanxi Normal University, Linfen 041004, People’s Republic of ChinaThe magnetic and transport properties of Fe3O4 films with a series of thicknesses are investigated. For the films with thickness below 15 nm, the saturation magnetization (Ms) increases and the coercivity decreases with the decrease in films’ thickness. The Ms of 3 nm Fe3O4 film is dramatically increased to 1017 emu/cm3. As for films’ thickness more than 15 nm, Ms is tending to be close to the Fe3O4 bulk value. Furthermore, the Verwey transition temperature (Tv) is visible for all the films, but suppressed for 3 nm film. We also find that the ρ of 3 nm film is the highest of all the films. The suppressed Tv and high ρ may be related to the islands morphology in 3 nm film. To study the structure, magnetic, and transport properties of the Fe3O4 films, we propose that the giant magnetic moment most likely comes from the spin of Fe ions in the tetrahedron site switching parallel to the Fe ions in the octahedron site at the surface, interface, and grain boundaries. The above results are of great significance and also provide a promising future for either device applications or fundamental research.http://dx.doi.org/10.1063/1.4944590 |
| spellingShingle | Xiaofen Guan Guowei Zhou Wuhong Xue Zhiyong Quan Xiaohong Xu The investigation of giant magnetic moment in ultrathin Fe3O4 films APL Materials |
| title | The investigation of giant magnetic moment in ultrathin Fe3O4 films |
| title_full | The investigation of giant magnetic moment in ultrathin Fe3O4 films |
| title_fullStr | The investigation of giant magnetic moment in ultrathin Fe3O4 films |
| title_full_unstemmed | The investigation of giant magnetic moment in ultrathin Fe3O4 films |
| title_short | The investigation of giant magnetic moment in ultrathin Fe3O4 films |
| title_sort | investigation of giant magnetic moment in ultrathin fe3o4 films |
| url | http://dx.doi.org/10.1063/1.4944590 |
| work_keys_str_mv | AT xiaofenguan theinvestigationofgiantmagneticmomentinultrathinfe3o4films AT guoweizhou theinvestigationofgiantmagneticmomentinultrathinfe3o4films AT wuhongxue theinvestigationofgiantmagneticmomentinultrathinfe3o4films AT zhiyongquan theinvestigationofgiantmagneticmomentinultrathinfe3o4films AT xiaohongxu theinvestigationofgiantmagneticmomentinultrathinfe3o4films AT xiaofenguan investigationofgiantmagneticmomentinultrathinfe3o4films AT guoweizhou investigationofgiantmagneticmomentinultrathinfe3o4films AT wuhongxue investigationofgiantmagneticmomentinultrathinfe3o4films AT zhiyongquan investigationofgiantmagneticmomentinultrathinfe3o4films AT xiaohongxu investigationofgiantmagneticmomentinultrathinfe3o4films |