Japanese Journal of Applied Physics最新文献_第3页

Ta5+-substitution effects on crystal structure and ferroelectric property in HfO2-based films Ta5+ 取代对 HfO2 基薄膜晶体结构和铁电特性的影响

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-16 DOI: 10.35848/1347-4065/ad6fa9

Yoshiki Maekawa, Takanori Mimura, Yoshiyuki Inaguma, Hiroshi Uchida, Yuxian Hu, Kazuki Okamoto and Hiroshi Funakubo

{"title":"Ta5+-substitution effects on crystal structure and ferroelectric property in HfO2-based films","authors":"Yoshiki Maekawa, Takanori Mimura, Yoshiyuki Inaguma, Hiroshi Uchida, Yuxian Hu, Kazuki Okamoto and Hiroshi Funakubo","doi":"10.35848/1347-4065/ad6fa9","DOIUrl":"https://doi.org/10.35848/1347-4065/ad6fa9","url":null,"abstract":"To investigate the Ta5+-substitution effects on crystal structure and ferroelectric property in HfO2-based films, TaxHf1−xO2+δ films with various film thicknesses and Ta content were prepared. The ferroelectric orthorhombic phase was formed in a wide film thickness range of 20–100 nm while in a narrow composition range of x = 0.10–0.14. These thickness-insensitive and composition-sensitive characteristics of Ta5+-substituted HfO2 film are similar to Y3+ rather than Zr4+. The X-ray photoelectron spectroscopy measurement suggests that the ionic state of Ta is not reduced and TaxHf1−xO2+δ film has an excess oxygen state. The excess oxygen may consist of a combination of oxygen vacancies and more interstitial oxygens. These defects facilitate the formation of the ferroelectric phasebut also decrease the breakdown voltage and increase the leakage current in Ta5+-substituted HfO2 films. On the other hand, the generation of excess oxygen indicates the possibility of controlling oxygen vacancies which deteriorate fatigue and retention properties.","PeriodicalId":14741,"journal":{"name":"Japanese Journal of Applied Physics","volume":"9 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid oxygen plasma treatment of tin oxide layers for improving the light stability of perovskite solar cells 对氧化锡层进行快速氧等离子处理以提高过氧化物太阳能电池的光稳定性

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-16 DOI: 10.35848/1347-4065/ad7790

Kohei Yamamoto, Yuji Yoshida and Takurou N. Murakami

引用次数: 0

Growth orientation control in rapid solid-state crystal growth of (K,Na)NbO3 single crystals using plate-like NaNbO3 single crystal particles 利用板状 NaNbO3 单晶颗粒快速固态晶体生长(K,Na)NbO3 单晶时的生长方向控制

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-12 DOI: 10.35848/1347-4065/ad7146

Hiromi Osaka, Takaaki Morimoto and Keisuke Ishii

{"title":"Growth orientation control in rapid solid-state crystal growth of (K,Na)NbO3 single crystals using plate-like NaNbO3 single crystal particles","authors":"Hiromi Osaka, Takaaki Morimoto and Keisuke Ishii","doi":"10.35848/1347-4065/ad7146","DOIUrl":"https://doi.org/10.35848/1347-4065/ad7146","url":null,"abstract":"The rolling-extended orientation technique and plate-like NaNbO3 (NN) single crystal particles prepared by a single-step molten salt synthesis, both of which have been developed to fabricate (K, Na)NbO3 (KNN) textured ceramics, were utilized to control the growth orientation of KNN single crystals synthesized by a rapid solid-stated crystal growth (RSSCG) method. As the seed crystals, two kinds of NN single crystal particles were synthesized using pure NaCl and KCl-NaCl mixed molten salts. Plate-like KNN single crystals of about 1 cm squares with the upper and lower faces almost parallel to the (100) (001) planes were obtained with a probability exceeding 50% when NN single crystal particles were synthesized from mixed salts and were subsequently thermal-treated again in Na2CO3-NaCl mixed molten salts under appropriate conditions to remove the Bi element, which is known as the suppression factor of the crystal growth. The average crystal growth rate was 0.6–1.2 mm h−1. Controlling the growth orientation of KNN single crystals produced by the SSCG method using seed crystals other than KTaO3 single crystals was successfully accomplished for the first time.","PeriodicalId":14741,"journal":{"name":"Japanese Journal of Applied Physics","volume":"9 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Origin of the ultrahigh field-induced strain in the Gd-doped 0.854Bi0.5Na0.5TiO3-0.12Bi0.5K0.5TiO3-0.026BaTiO3 ternary ceramic system 掺钆 0.854Bi0.5Na0.5TiO3-0.12Bi0.5K0.5TiO3-0.026BaTiO3 三元陶瓷体系中的超高磁场诱导应变的起源

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-12 DOI: 10.35848/1347-4065/ad7147

Namık Kemal Gözüaçık and Sedat Alkoy

{"title":"Origin of the ultrahigh field-induced strain in the Gd-doped 0.854Bi0.5Na0.5TiO3-0.12Bi0.5K0.5TiO3-0.026BaTiO3 ternary ceramic system","authors":"Namık Kemal Gözüaçık and Sedat Alkoy","doi":"10.35848/1347-4065/ad7147","DOIUrl":"https://doi.org/10.35848/1347-4065/ad7147","url":null,"abstract":"This study focused on analyzing the ferroelectric, piezoelectric, and dielectric properties of lead-free Bi0.487Na0.427K0.06Ba0.026TiO3 (0.854BNT-0.12BKT-0.026BT) ternary ceramic system by systematically doping 0.001, 0.01, 0.1, 0.5, and 1.0 mol% Gd2O3. The specific composition that was investigated is located at the tetragonal side of the rhombohedral-tetragonal morphotropic phase boundary (MPB) region. Undoped and Gd-doped BNT-BKT-BT ceramics were produced by the conventional solid-state reaction method. Ferroelectric, piezoelectric, and dielectric properties of ceramics were analyzed by carrying out electrical measurements from sintered samples. An ultrahigh field-induced unipolar strain of 0.52% at 65 kV cm−1, with a converse piezoelectric coefficient d33* of up to 795 pm V−1, was achieved with 0.5 mol% Gd doping. This was attributed to the Gd dopant disrupting the normal ferroelectric order and leading to the formation of a nonpolar relaxor phase. The field-induced transition from the nonpolar relaxor phase to the normal ferroelectric phase resulted in relatively large field-induced strain values in the 0.5 mol% Gd-doped ceramics. These results suggest that Gd-doped BNT-BKT-BT ceramics hold promise for digital actuator applications.","PeriodicalId":14741,"journal":{"name":"Japanese Journal of Applied Physics","volume":"197 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Room temperature synthesis of BaTiO3 nanoparticles using titanium bis(ammonium lactato) dihydroxide 利用双（乳酸铵）二氢氧化钛在室温下合成 BaTiO3 纳米粒子

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-12 DOI: 10.35848/1347-4065/ad70c1

Sou Yasuhara, Akira Orio, Shintaro Yasui and Takuya Hoshina

{"title":"Room temperature synthesis of BaTiO3 nanoparticles using titanium bis(ammonium lactato) dihydroxide","authors":"Sou Yasuhara, Akira Orio, Shintaro Yasui and Takuya Hoshina","doi":"10.35848/1347-4065/ad70c1","DOIUrl":"https://doi.org/10.35848/1347-4065/ad70c1","url":null,"abstract":"BaTiO3, known for its exceptional ferroelectric properties, is extensively applied in multi-layer ceramics capacitors (MLCCs). Achieving reliable, high-performance MLCCs requires sophisticated ceramics processes, notably in synthesizing submicron-order BaTiO3 powder with a narrow size distribution. Among various synthesis methods explored for submicron-size BaTiO3 powder, room temperature liquid-phase synthesis is most desirable due to its cost-effectiveness and large batch availability. In this study, we propose a synthesis method for obtaining BaTiO3 nanopowder at room temperature using titanium bis(ammonium lactato) dihydroxide and Ba(OH)2·8H2O as starting materials, reacted in tert-butylamine with NaOH and ethanol. The resulting powder, exhibiting a cubic phase of BaTiO3 with an average particle size of 35.8 nm, was obtained after a 7-day reaction at room temperature. Characterization involved X-ray diffraction, differential thermal analysis‒thermogravimetry, and scanning electron microscopy. Subsequently, the powder was used to sinter a BaTiO3 ceramic, whose dielectric performance was then evaluated.","PeriodicalId":14741,"journal":{"name":"Japanese Journal of Applied Physics","volume":"110 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation of ferroelectric domains in BaTiO3 by synchrotron radiation X-ray diffraction topography 通过同步辐射 X 射线衍射拓扑观察 BaTiO3 中的铁电畴

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-12 DOI: 10.35848/1347-4065/ad6e93

Kenji Ohwada and Akihiko Machida

引用次数: 0

Local and electronic structures of NaNbO3, AgNbO3, and KNbO3 NaNbO3、AgNbO3 和 KNbO3 的局部结构和电子结构

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-12 DOI: 10.35848/1347-4065/ad72fc

Yasuhiro Yoneda, Tohru Kobayashi, Takuya Tsuji, Daiju Matsumura, Yuji Saitoh and Yuji Noguchi

引用次数: 0

Reduction mechanism of loss tangent of scandium-doped aluminum nitride thin film by post-deposition annealing 沉积后退火降低掺钪氮化铝薄膜损耗正切的机理

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-11 DOI: 10.35848/1347-4065/ad7343

Akihiko Teshigahara, Tetsuya Enomoto, Hideo Yamada and Shinya Yoshida

引用次数: 0

Using magneto-optical effects in soft X-ray reflectivity to study current driven magnetization reversal 利用软 X 射线反射中的磁光效应研究电流驱动的磁化反转

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-11 DOI: 10.35848/1347-4065/ad760b

Kiranjot, Raymond Fan, R. O. M. Aboljadayel, David M. Burn, Kalel Alsaeed, Aidan T. Hindmarch and Paul Steadman

引用次数: 0

Effect of oxygen content in CuO x nanofilms on chloride ion detection for ion sensor applications CuO x 纳米薄膜中的氧含量对离子传感器应用中氯离子检测的影响

IF 1.5 4区物理与天体物理

Japanese Journal of Applied Physics Pub Date : 2024-09-11 DOI: 10.35848/1347-4065/ad7342

Yoshinari Kimura, Michihiro Sasaki and Hironori Tohmyoh

引用次数: 0