Magnetic behavior in an ordered Co nanorod array |
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Authors: | Wang T Wang Y Fu Y Hasegawa T Oshima H Itoh K Nishio K Masuda H Li F S Saito H Ishio S |
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Affiliation: | VBL of Akita University, Gakuen Machi 1-1, Tegata, Akita 010-8502, Japan. Institute of Applied Magnetics, Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People's Republic of China. |
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Abstract: | The magnetization reversal process of an ordered Co nanorod array is shown using the images obtained from successive in-field magnetic force microscope (MFM) measurements. The magnetization reversal model is discussed according to local and whole magnetization reversal properties measured by the polar magneto-optical Kerr effect (PMOKE) and an alternating gradient magnetometer (AGM), respectively. Additionally, the dipolar field was probed using in-field MFM measurements. By removing the effect of the dipolar field, an intrinsic switching field distribution (SFD) is shown in a map with a hexagonal array. A detailed study of the dipolar field in ordered nanorod arrays with various diameters and pitches was carried out by numerical calculations. |
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