Kelvin Probe Force Microscopy of Periodic Ferroelectric Domain Structure in KTiOPO4 Crystals
Келвин-зондовая силовая микроскопия периодической доменной структуры в кристаллах KTiOPO4
2002-04-10
SCID: 54.1/e3fa4fng
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KTiOPO4Kelvin probe force microscopycontact potential differenceperiodic ferroelectric domain structurescreening by potassium ions
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Abstract (AI)
Mono- and periodically poled domain structures of ferroelectric KTiOPO 4 crystals have been studied by Kelvin probe force microscopy. This scanning probe method has allowed us to image the domain structure using a contact potential difference contrast between 180° ferroelectric domains. The measured contact potential difference between adjacent domains showed that the screening in the KTiOPO 4 crystals is provided by the highly mobile potassium ions. The screening charge density distribution and the resulting Debye length near the polar faces have been estimated.
Key Findings
1
Kelvin probe force microscopy (KPFM) successfully images mono- and periodically poled 180° ferroelectric domain structures in KTiOPO4 via contact potential difference contrast.
2
Measured contact potential differences between adjacent 180° domains indicate screening in KTiOPO4 is provided by highly mobile potassium ions.
3
The resulting Debye length near the polar faces of KTiOPO4 crystals has been estimated from KPFM measurements.
4
The study estimates the screening charge density distribution near polar faces of KTiOPO4 crystals.
Research Object
Periodic and mono-poled ferroelectric domain structures in KTiOPO4 (KTP) crystals imaged by Kelvin probe force microscopy
Research Subject
Contact potential difference contrast between 180° ferroelectric domains, identification of screening by mobile potassium ions, and estimation of screening charge density distribution and Debye length near polar faces
Publication Details
Publication Date
2002-04-10
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