TY - JOUR
T1 - Magnetic and dielectric properties of layered perovskite Gd 2Ti 2O 7 thin film epitaxially stabilized on a perovskite single crystal
AU - Ukita, Takashi
AU - Hirose, Yasushi
AU - Ohno, Sawako
AU - Hatabayashi, Kunitada
AU - Fukumura, Tomoteru
AU - Hasegawa, Tetsuya
N1 - Funding Information:
This research was supported by the Ministry of Education, Culture, Sports, Science and Technology as part of the Global COE Program for Chemistry Innovation and Marubun research promotion foundation.
PY - 2012/4/1
Y1 - 2012/4/1
N2 - Layered perovskite (LP) titanates, Ln 2Ti 2O 7 (Ln lanthanoids), are ferroelectric materials containing magnetic Ln 3 ions at A-site. Metastable LP-Gd 2Ti 2O 7 was fabricated in epitaxial thin film form on lattice-matched perovskite substrates and its dielectric and magnetic properties were investigated. The (100)-oriented LP-Gd 2Ti 2O 7 films were epitaxially grown on (110) plane of (LaAlO 3) 0.3-(SrAl 0.5Ta 0.5O 3) 0.7 (LSAT) and Nb-doped SrTiO 3 by using a pulsed laser deposition method. Piezoresponse force microscope measurements revealed that LP-Gd 2Ti 2O 7 has spontaneous polarization along the b-axis at room temperature, strongly suggesting room temperature ferroelectricity. Magnetization measurements showed paramagnetic behavior with weak antiferromagnetic interaction around 2 K. Small positive magneto-dielectric effect (/ ∼ 10 -5 order) was also confirmed at 10 K.
AB - Layered perovskite (LP) titanates, Ln 2Ti 2O 7 (Ln lanthanoids), are ferroelectric materials containing magnetic Ln 3 ions at A-site. Metastable LP-Gd 2Ti 2O 7 was fabricated in epitaxial thin film form on lattice-matched perovskite substrates and its dielectric and magnetic properties were investigated. The (100)-oriented LP-Gd 2Ti 2O 7 films were epitaxially grown on (110) plane of (LaAlO 3) 0.3-(SrAl 0.5Ta 0.5O 3) 0.7 (LSAT) and Nb-doped SrTiO 3 by using a pulsed laser deposition method. Piezoresponse force microscope measurements revealed that LP-Gd 2Ti 2O 7 has spontaneous polarization along the b-axis at room temperature, strongly suggesting room temperature ferroelectricity. Magnetization measurements showed paramagnetic behavior with weak antiferromagnetic interaction around 2 K. Small positive magneto-dielectric effect (/ ∼ 10 -5 order) was also confirmed at 10 K.
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U2 - 10.1063/1.3673546
DO - 10.1063/1.3673546
M3 - Article
AN - SCOPUS:84861742469
SN - 0021-8979
VL - 111
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 7
M1 - 07D909
ER -