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Nanoscale imaging of domains and domain walls in periodically poled ferroelectrics using atomic force microscopy (2002)

Wittborn, J. ; Canalias, C. ; Rao, K. V.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 80 (2002), S. 1622-1624

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: We use the inverse piezoelectric effect for high-resolution imaging of artificially produced ferroelectric domains in periodically poled potassium titanium phosphate, KTiOPO4, and lithium niobate, LiNbO3, crystals using a modified atomic force microscope (AFM). By monitoring the vertical as well as the lateral deflection of the AFM tip, details of the domains and the domain walls were obtained at 1 nm resolution. With this approach we determine the domain wall width to be 20–80 nm for KTiOPO4 and about 150 nm for LiNbO3. The above technique is of importance in tailoring ferroelectric crystals for frequency conversion of lasers and studies of domain walls in ferroelectric and its magnetic analogs. © 2002 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1455700

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Digitale Medien

Magnetic domain and domain-wall imaging of submicron Co dots by probing the magnetostrictive response using atomic force microscopy (2000)

Wittborn, J. ; Rao, K. V.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 76 (2000), S. 2931-2933

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: An approach to image the domains and domain walls of small ferromagnetic entities using atomic force microscopy (AFM), with a nonmagnetic AFM probe, has been developed. Exciting the sample in an external ac magnetic field, the distribution of magnetostrictive response at the surface is detected. By this technique, the domains and domain walls of submicron Co dots have been imaged with a 1 nm lateral resolution. In elliptical Co dots with a 350-nm-long axis on a triangular lattice array with 400 nm periodicity, we find evidence for two domains with opposite magnetization orientation across a wall. The domain-wall width in these dots is found to be about 35 nm. Furthermore, we observe a ferromagnetic alignment of the domains in the neighboring dots, which suggests a magnetostatic interaction among the dots. © 2000 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.126520

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