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Electron spin is very important for investigating magnetic properties of nano-structure surface on the atomic scale. Magnetic exchange force microscope (MExFM) which is a significant method of measuring exchange force of electron spin, is adopted. However, the external magnetic field is necessary for the MExFM, which will damage the structure of the sample surface; further, cross-talk between topography and spin information becomes serious for separating the two signals in MExFM measurement. These shortcomings will restrict the application of MExFM. In order to solve these problems, we develop a new method to separate the topography from the spin information using ferromagnetic resonance by microwave radiation combined MExFM and atomic force microscopy. We demonstrate that the topography and spin information can be completely separated from each other using this method theoretically and experimentally. MExFM using ferromagnetic resonance effect is very useful for developing spintronic devices and new-generation magnetic materials.
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Keywords:
- atomic force microscope /
- magnetic exchange force microscope /
- spin /
- ferromagnetic resonance
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[2] Wolf S A, Awschalo D D, Buhrman R A, Daughton J M, Molnar S V, Roukes M L, Chtchelkanova A Y, Treger D M 2001 Science 294 1488
[3] Heinze S, Bode M, Kubetzka A, Pietzsch O, Nie X, Blugel S, Wiesendanger R 2000 Science 288 1805
[4] Wiesendanger R, Gunthorodt H J, Guntherodt G, Gambino R J, Ruf R 1990 Phys. Rev. Lett. 65 247
[5] Hartmann U A 1999 Annu. Rev. Mater. Res. 29 53
[6] Kaiser U, Schwarz A, Wiesendanger R 2007 Nature 446 522
[7] Schmidt R, Lazo C, Kaiser U, Schwarz A, Heinze S, Wiesendanger R 2011 Phys. Rev. Lett. 106 257
[8] Lazo C, Heinze S 2011 Phys. Rev. B 84 144428
[9] Giessibl F J 1995 Science 267 68
[10] Giessibl F J 2003 Rev. Mod. Phys. 75 949
[11] Sugawara Y, Ohta M, Ueyama H, Morita S 1995 Science 270 1646
[12] Wiesendanger R 2009 Rev. Mod. Phys. 81 1495
[13] Meier F, Zhou L, Wiebe J, Wiesendanger R 2008 Science 320 82
[14] Ashino M, Schwarz A, Behnke T, Wiesendanger R 2004 Phys. Rev. Lett. 93 136101
[15] Meier F, Zhou L, Wiebe J, Wiesendanger R 2008 Science 320 82
[16] Schmidt R, Lazo C, Holscher H, Pi U H, Caciuc V, Schwarz A, Wiesendanger R, Heinze S 2009 Nano Lett. 9 200
[17] Saito H, Ito R, Egawa G, Li Z, Yoshimura S 2011 J. Appl. Phys. 109 07E330
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[1] Gary A P 1998 Science 282 1660
[2] Wolf S A, Awschalo D D, Buhrman R A, Daughton J M, Molnar S V, Roukes M L, Chtchelkanova A Y, Treger D M 2001 Science 294 1488
[3] Heinze S, Bode M, Kubetzka A, Pietzsch O, Nie X, Blugel S, Wiesendanger R 2000 Science 288 1805
[4] Wiesendanger R, Gunthorodt H J, Guntherodt G, Gambino R J, Ruf R 1990 Phys. Rev. Lett. 65 247
[5] Hartmann U A 1999 Annu. Rev. Mater. Res. 29 53
[6] Kaiser U, Schwarz A, Wiesendanger R 2007 Nature 446 522
[7] Schmidt R, Lazo C, Kaiser U, Schwarz A, Heinze S, Wiesendanger R 2011 Phys. Rev. Lett. 106 257
[8] Lazo C, Heinze S 2011 Phys. Rev. B 84 144428
[9] Giessibl F J 1995 Science 267 68
[10] Giessibl F J 2003 Rev. Mod. Phys. 75 949
[11] Sugawara Y, Ohta M, Ueyama H, Morita S 1995 Science 270 1646
[12] Wiesendanger R 2009 Rev. Mod. Phys. 81 1495
[13] Meier F, Zhou L, Wiebe J, Wiesendanger R 2008 Science 320 82
[14] Ashino M, Schwarz A, Behnke T, Wiesendanger R 2004 Phys. Rev. Lett. 93 136101
[15] Meier F, Zhou L, Wiebe J, Wiesendanger R 2008 Science 320 82
[16] Schmidt R, Lazo C, Holscher H, Pi U H, Caciuc V, Schwarz A, Wiesendanger R, Heinze S 2009 Nano Lett. 9 200
[17] Saito H, Ito R, Egawa G, Li Z, Yoshimura S 2011 J. Appl. Phys. 109 07E330
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