Room temperature multiferroic effects in superlattice nanocapacitors

S. Dussan; A. Kumar; J. F. Scott; S. Priya; R. S. Katiyar

doi:10.1063/1.3528210

Room temperature multiferroic effects in superlattice nanocapacitors

S. Dussan, A. Kumar, J. F. Scott, S. Priya, R. S. Katiyar

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Abstract

A composite nanocapacitor was fabricated based on ferroelectric PbZr _0.52 TiM_0.48 O₃ (PZT) and half-metallic oxide La0.67 Sr0.33 MnO₃ (LSMO) with 5 nm/1 nm periodicity, respectively. X-ray θ-2θ scan and φ-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 μC/ cm² and magnetization of 50 emu/ cm³ were measured for superlattice nanocapacitors. Local piezo force microscopy measurements revealed switching of polarization under external bias field confirming ferroelectric behavior. Zero field cooling measurements showed the existence of cusp in magnetization at low temperatures indicating spin-glass-like behavior contrary to Pb (Zr_x Ti_1-x) O₃/La_x Sr _1-x MnO₃ bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling.

Original language	English (US)
Article number	252902
Journal	Applied Physics Letters
Volume	97
Issue number	25
DOIs	https://doi.org/10.1063/1.3528210
State	Published - Dec 20 2010
Externally published	Yes

Bibliographical note

Funding Information:
This work was partially supported by DoE FG 02-08ER46526 and NSF-RII-0701-525 grants to UPR.

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title = "Room temperature multiferroic effects in superlattice nanocapacitors",

abstract = "A composite nanocapacitor was fabricated based on ferroelectric PbZr 0.52 TiM0.48 O3 (PZT) and half-metallic oxide La0.67 Sr0.33 MnO3 (LSMO) with 5 nm/1 nm periodicity, respectively. X-ray θ-2θ scan and φ-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 μC/ cm2 and magnetization of 50 emu/ cm3 were measured for superlattice nanocapacitors. Local piezo force microscopy measurements revealed switching of polarization under external bias field confirming ferroelectric behavior. Zero field cooling measurements showed the existence of cusp in magnetization at low temperatures indicating spin-glass-like behavior contrary to Pb (Zrx Ti1-x) O3/Lax Sr 1-x MnO3 bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling.",

author = "S. Dussan and A. Kumar and Scott, {J. F.} and S. Priya and Katiyar, {R. S.}",

note = "Funding Information: This work was partially supported by DoE FG 02-08ER46526 and NSF-RII-0701-525 grants to UPR.",

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AU - Dussan, S.

AU - Kumar, A.

AU - Scott, J. F.

AU - Priya, S.

AU - Katiyar, R. S.

N1 - Funding Information: This work was partially supported by DoE FG 02-08ER46526 and NSF-RII-0701-525 grants to UPR.

PY - 2010/12/20

Y1 - 2010/12/20

N2 - A composite nanocapacitor was fabricated based on ferroelectric PbZr 0.52 TiM0.48 O3 (PZT) and half-metallic oxide La0.67 Sr0.33 MnO3 (LSMO) with 5 nm/1 nm periodicity, respectively. X-ray θ-2θ scan and φ-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 μC/ cm2 and magnetization of 50 emu/ cm3 were measured for superlattice nanocapacitors. Local piezo force microscopy measurements revealed switching of polarization under external bias field confirming ferroelectric behavior. Zero field cooling measurements showed the existence of cusp in magnetization at low temperatures indicating spin-glass-like behavior contrary to Pb (Zrx Ti1-x) O3/Lax Sr 1-x MnO3 bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling.

AB - A composite nanocapacitor was fabricated based on ferroelectric PbZr 0.52 TiM0.48 O3 (PZT) and half-metallic oxide La0.67 Sr0.33 MnO3 (LSMO) with 5 nm/1 nm periodicity, respectively. X-ray θ-2θ scan and φ-scan revealed epitaxial growth of nanocapacitors. At room temperature, a microscopic polarization of 11 μC/ cm2 and magnetization of 50 emu/ cm3 were measured for superlattice nanocapacitors. Local piezo force microscopy measurements revealed switching of polarization under external bias field confirming ferroelectric behavior. Zero field cooling measurements showed the existence of cusp in magnetization at low temperatures indicating spin-glass-like behavior contrary to Pb (Zrx Ti1-x) O3/Lax Sr 1-x MnO3 bilayer structure. Frequency dependent dielectric anomaly was observed near room temperature suggesting dynamic magneto (resistance)-dielectric coupling.

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Room temperature multiferroic effects in superlattice nanocapacitors

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