scholarly journals Tailored surfaces of perovskite oxide substrates for conducted growth of thin films

2014 ◽  
Vol 43 (7) ◽  
pp. 2272-2285 ◽  
Author(s):  
Florencio Sánchez ◽  
Carmen Ocal ◽  
Josep Fontcuberta
Keyword(s):  
Thin Films ◽  
Single Crystals ◽  
Perovskite Oxide ◽  
Functional Nanostructures ◽  
Oxide Substrates ◽  
Tailored Surfaces

Overview of strategies for chemical termination control in perovskite single crystals and their use for the smart fabrication of functional nanostructures.

scholarly journals Spontaneous phase segregation of Sr2NiO3 and SrNi2O3 during SrNiO3 heteroepitaxy

2021 ◽  
Vol 7 (10) ◽  
pp. eabe2866
Author(s):  
Le Wang ◽  
Zhenzhong Yang ◽  
Xinmao Yin ◽  
Sandra D. Taylor ◽  
Xu He ◽  
...  
Keyword(s):  
Thin Films ◽  
Molecular Beam ◽  
High Temperature Superconductivity ◽  
Phase Segregation ◽  
Perovskite Oxide ◽  
Oxide Thin Film ◽  
Structures And Properties ◽  
Oxide Substrates ◽  
Film Nucleation ◽  
Spontaneous Phase

Recent discovery of superconductivity in Nd0.8Sr0.2NiO2 motivates the synthesis of other nickelates for providing insights into the origin of high-temperature superconductivity. However, the synthesis of stoichiometric R1−xSrxNiO3 thin films over a range of x has proven challenging. Moreover, little is known about the structures and properties of the end member SrNiO3. Here, we show that spontaneous phase segregation occurs while depositing SrNiO3 thin films on perovskite oxide substrates by molecular beam epitaxy. Two coexisting oxygen-deficient Ruddlesden-Popper phases, Sr2NiO3 and SrNi2O3, are formed to balance the stoichiometry and stabilize the energetically preferred Ni2+ cation. Our study sheds light on an unusual oxide thin-film nucleation process driven by the instability in perovskite structured SrNiO3 and the tendency of transition metal cations to form their most stable valence (i.e., Ni2+ in this case). The resulting metastable reduced Ruddlesden-Popper structures offer a testbed for further studying emerging phenomena in nickel-based oxides.

scholarly journals Stabilization of Ferroelectric Phase in Highly Oriented Quinuclidinium Perrhenate (HQReO4) Thin Films

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2126
Author(s):  
Junyoung Lee ◽  
Woojun Seol ◽  
Gopinathan Anoop ◽  
Shibnath Samanta ◽  
Sanjith Unithrattil ◽  
...  
Keyword(s):  
Thin Films ◽  
Solution Process ◽  
Intermediate Temperature ◽  
Perovskite Oxide ◽  
Temperature Phase ◽  
Polar Phase ◽  
Practical Applications ◽  
Temperature Range ◽  
Potential Alternative ◽  
Temperature Window

The low-temperature processability of molecular ferroelectric (FE) crystals makes them a potential alternative for perovskite oxide-based ferroelectric thin films. Quinuclidinium perrhenate (HQReO4) is one such molecular FE crystal that exhibits ferroelectricity when crystallized in an intermediate temperature phase (ITP). However, bulk HQReO4 crystals exhibit ferroelectricity only for a narrow temperature window (22 K), above and below which the polar phase transforms to a non-FE phase. The FE phase or ITP of HQReO4 should be stabilized in a much wider temperature range for practical applications. Here, to stabilize the FE phase (ITP) in a wider temperature range, highly oriented thin films of HQReO4 were prepared using a simple solution process. A slow evaporation method was adapted for drying the HQReO4 thin films to control the morphology and the temperature window. The temperature window of the intermediate temperature FE phase was successfully widened up to 35 K by merely varying the film drying temperature between 333 and 353 K. The strategy of stabilizing the FE phase in a wider temperature range can be adapted to other molecular FE materials to realize flexible electronic devices.

Phenethylammonium bismuth halides: from single crystals to bulky-organic cation promoted thin-film deposition for potential optoelectronic applications

2019 ◽  
Vol 7 (36) ◽  
pp. 20733-20741 ◽  
Author(s):  
Mehri Ghasemi ◽  
Miaoqiang Lyu ◽  
Md Roknuzzaman ◽  
Jung-Ho Yun ◽  
Mengmeng Hao ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Roughness ◽  
Single Crystals ◽  
Organic Cation ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Optoelectronic Applications ◽  
Excellent Stability

The phenethylammonium cation significantly promotes the formation of fully-covered thin-films of hybrid bismuth organohalides with low surface roughness and excellent stability.

Surface acoustic wave measurements of YBa2Cu3O7−δ thin films and single crystals

1997 ◽  
Vol 70 (11) ◽  
pp. 1468-1470 ◽  
Author(s):  
R. Gaffney ◽  
C. Hucho ◽  
J. R. Feller ◽  
M. J. McKenna ◽  
B. K. Sarma ◽  
...  
Keyword(s):  
Thin Films ◽  
Acoustic Wave ◽  
Single Crystals ◽  
Surface Acoustic Wave ◽  
Wave Measurements

Electronic band structure of gallium nitride: a comparative angle-resolved photoemission study of single crystals and thin films

2002 ◽  
Vol 507-510 ◽  
pp. 223-228 ◽  
Author(s):  
L. Plucinski ◽  
T. Strasser ◽  
B.J. Kowalski ◽  
K. Rossnagel ◽  
T. Boetcher ◽  
...  
Keyword(s):  
Thin Films ◽  
Gallium Nitride ◽  
Band Structure ◽  
Single Crystals ◽  
Electronic Band Structure ◽  
Electronic Band ◽  
Photoemission Study

Paramagnetic Character in Thin Films of Metal-Free Organic Magnets Deposited on TiO2(110) Single Crystals

2013 ◽  
Vol 117 (50) ◽  
pp. 26675-26679 ◽  
Author(s):  
Reza Kakavandi ◽  
Sabine-Antonia Savu ◽  
Andrea Caneschi ◽  
Maria Benedetta Casu
Keyword(s):  
Thin Films ◽  
Single Crystals ◽  
Metal Free ◽  
Organic Magnets

scholarly journals A 350 mK, 9 T scanning tunneling microscope for the study of superconducting thin films on insulating substrates and single crystals

2013 ◽  
Vol 84 (12) ◽  
pp. 123905 ◽  
Author(s):  
Anand Kamlapure ◽  
Garima Saraswat ◽  
Somesh Chandra Ganguli ◽  
Vivas Bagwe ◽  
Pratap Raychaudhuri ◽  
...  
Keyword(s):  
Thin Films ◽  
Single Crystals ◽  
Scanning Tunneling Microscope ◽  
Scanning Tunneling ◽  
Superconducting Thin Films ◽  
Tunneling Microscope ◽  
Insulating Substrates

scholarly journals EPITAXIAL GROWTH OF PEROVSKITE OXIDE THIN FILMS

1999 ◽  
Vol 48 (10) ◽  
pp. 1917
Author(s):  
LIAN GUI-JUN ◽  
LI MEI-YA ◽  
KANG JIN-FENG ◽  
GUO JIAN-DONG ◽  
SUN YUN-FENG ◽  
...  
Keyword(s):  
Thin Films ◽  
Epitaxial Growth ◽  
Perovskite Oxide ◽  
Oxide Thin Films ◽  
Perovskite Oxide Thin Films
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