Current Applied Physics最新文献_第8页

Magnetocaloric effect of LiErP4O12 single crystal exhibiting competing ferromagnetic and anti-ferromagnetic interactions 表现出竞争性铁磁和反铁磁相互作用的 LiErP4O12 单晶的磁ocaloric 效应

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-10-04 DOI: 10.1016/j.cap.2024.10.004

Dimitar N. Petrov , J. Ćwik , H.N. Nhat , D.-H. Kim , T.L. Phan

{"title":"Magnetocaloric effect of LiErP4O12 single crystal exhibiting competing ferromagnetic and anti-ferromagnetic interactions","authors":"Dimitar N. Petrov , J. Ćwik , H.N. Nhat , D.-H. Kim , T.L. Phan","doi":"10.1016/j.cap.2024.10.004","DOIUrl":"10.1016/j.cap.2024.10.004","url":null,"abstract":"<div><div>In this paper, we discuss the magnetic behavior and magnetocaloric effect of lithium erbium tetraphosphate (LiErP4O12) single crystal in the temperature range 2–85 K under magnetic fields up to 50 kOe. Detailed investigation of the temperature-dependent magnetization M(T) proves an existence of magnetic ordering below Tm, which has been estimated as a minimum in the dM/dT vs. T dependence. Above Tm, LiErP4O12 possesses paramagnetic behavior and its magnetic susceptibility follows the Curie-Weiss law giving a higher value of the effective magnetic moment of Er3+ compared to the theoretical one. This could be due to the Kramers spin degeneracy and the Stark structure of multiplets. Under an applied field H = 50 kOe, the maximum value of the magnetic-entropy change at 2 K reaches about 15 J/kgK, corresponding to a relative-cooling-power value of ∼343 J/kg. Assessments of the magnetic ordering exponent n and N(T, H) data prove LiErP4O12 exhibiting short-range magnetic order. Due to the absence of magnetic hysteresis and large magnetocaloric response, we believe that LiErP4O12 could be a promising candidate for magnetic-cooling applications in liquefying hydrogen and 3He isotope.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 224-229"},"PeriodicalIF":2.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427498","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

Enhanced Joule heat release at surface irregularities 表面不规则处焦耳热释放增强

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-10-02 DOI: 10.1016/j.cap.2024.09.013

G.Sh. Boltachev, P.A. Russkikh, S.A. Chaikovsky

引用次数: 0

Piezoelectric flexible generator based on Mn-doped ZnO/PVDF composite films for energy harvesting application 基于掺锰 ZnO/PVDF 复合薄膜的压电柔性发电机的能量采集应用

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-27 DOI: 10.1016/j.cap.2024.09.012

Aman Kumar, Richa Sharma

引用次数: 0

Spatially-resolved spectroscopic investigation of the inhomogeneous magnetic field effects on a low-pressure capacitively-coupled nitrogen plasma 非均相磁场对低压电容耦合氮等离子体影响的空间分辨光谱研究

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-27 DOI: 10.1016/j.cap.2024.09.010

Jonggu Han , Jihoon Kim , Woojin Park , Sang Jun Park , Song Yi Baek , Byeongsun Yoo , Chulhwan Choi , Se Youn Moon

{"title":"Spatially-resolved spectroscopic investigation of the inhomogeneous magnetic field effects on a low-pressure capacitively-coupled nitrogen plasma","authors":"Jonggu Han , Jihoon Kim , Woojin Park , Sang Jun Park , Song Yi Baek , Byeongsun Yoo , Chulhwan Choi , Se Youn Moon","doi":"10.1016/j.cap.2024.09.010","DOIUrl":"10.1016/j.cap.2024.09.010","url":null,"abstract":"<div><div>Although magnetized plasmas have been frequently used to enhance the process rate or improve the film quality via the control of ion flux as well as energy and plasma density in semiconductor processes, the inhomogeneous magnetic field—which leads to plasma non-uniformity—remains as a problem to be solved. To address this problem, it is essential to conduct a comprehensive assessment of the magnetic effect throughout the entire discharge. Therefore, in the present study, we investigated the magnetic field effects (B < 100 G) on a capacitively-coupled nitrogen plasma based on spectroscopic analyses. The spatially-resolved emission spectra were measured along the radial direction at various vertical positions under the pressures of 10 mTorr and 250 mTorr both with and without magnetic field. By analyzing emission spectra such as N2 FPS, N2 SPS, N2+ FNS, and N I, we were able to obtain the radial distributions of reactive species density, vibrational temperature, and excitation temperature. In low-pressure plasma, with the application of a magnetic field, maximum increases in vibrational temperature and excitation temperature of 462 K and 491 K, respectively, were observed within the bulk region beneath the magnet. This magnetic effect resulted in a significant increase in reactive species density along the radial direction. It was also found that the local enhancement of ion density by magnetic field was strongly related to the increase in excitation temperature and the density of the N2+(B) state. From this result, it is suggested that introducing an asymmetric magnetic field could modulate the spatial distributions of the physical and chemical properties of the plasma.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 180-188"},"PeriodicalIF":2.4,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427490","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

A comprehensive numerical study of bilayer SnSe/SnS absorber based solar cells 基于双层锡/锡吸收器的太阳能电池的综合数值研究

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-26 DOI: 10.1016/j.cap.2024.09.011

Rahul Kumar Yadav, Neha Bisht, Parag R. Patil, Ho Jae Ki, Sang Won Lee, Yong Tae Kim, Pravin S. Pawar, Indu Sharma, Vishesh Manjunath, Jaeyeong Heo

{"title":"A comprehensive numerical study of bilayer SnSe/SnS absorber based solar cells","authors":"Rahul Kumar Yadav, Neha Bisht, Parag R. Patil, Ho Jae Ki, Sang Won Lee, Yong Tae Kim, Pravin S. Pawar, Indu Sharma, Vishesh Manjunath, Jaeyeong Heo","doi":"10.1016/j.cap.2024.09.011","DOIUrl":"10.1016/j.cap.2024.09.011","url":null,"abstract":"<div><div>Herein, we present the simulation (using the SCAPS-1D program), of a bilayer absorber solar cell. First, we numerically studied the bilayer model using our experimentally observed parameters and investigated the results. The results from the bilayer absorber (SnSe/SnS) numerical analysis were then compared with a single (SnS and SnSe) absorber modeling. The optimized device with a bilayer absorber exhibited the highest performance, with a photo conversion efficiency (PCE) of 22.35%. In comparison, the single SnS and SnSe absorbers achieved a PCE of 14.79% and 13.69%. Furthermore, we compared this numerical study with our previous study having the same configuration. Although there was a significant difference in performance between the simulated and experimental studies, the outcomes of the fabricated devices exhibited similar trends to the simulations. Finally, we attempted to determine the key parameters responsible for the reduced performance in the experimental study.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 169-179"},"PeriodicalIF":2.4,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358584","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

Exploring interfacial stability for Zr-doped sulfide solid electrolyte with first-principle calculation 通过第一原理计算探索掺锆硫化物固体电解质的界面稳定性

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-25 DOI: 10.1016/j.cap.2024.09.009

Junbo Zhang , Wenjin Gong , Nini Qian , Bingbing Chen , Jianqiu Zhou

{"title":"Exploring interfacial stability for Zr-doped sulfide solid electrolyte with first-principle calculation","authors":"Junbo Zhang , Wenjin Gong , Nini Qian , Bingbing Chen , Jianqiu Zhou","doi":"10.1016/j.cap.2024.09.009","DOIUrl":"10.1016/j.cap.2024.09.009","url":null,"abstract":"<div><div>First-principles calculations are employed to investigate the interfacial properties on the Zr-doped sulfide solid electrolytes. Theoretical calculation results show that the PS4 tetrahedral structure near the Li/Li3PS4 interface is severely damaged, whereas the Zr-doped sulfide solid electrolyte interface structure has a slight deformation. The Li ions migration energy barrier on the Zr-doped sulfide solid electrolyte interface is relatively lower than that on the Li/Li3PS4. Moreover, the stress-strain analysis indicates that the Li/Li3PS4 interface structure experiences a maximum strain of only 6 %, while the Zr-doped sulfide solid electrolyte interface structure experiences a maximum strain of 10 %. This may be attributed to the ability of Zr doping to prevent S2− diffusion into the lithium metal anode and stabilize the Li ion transport skeleton. Therefore, Zr doping can improve the interface structure stability. This study will provide a useful perspective for designing high performance of solid electrolytes for the application of all-solid-state batteries.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 144-150"},"PeriodicalIF":2.4,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327949","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

Electrical characterization of lead-modified bismuth borovanadate glasses 铅改性硼钒酸铋玻璃的电学特性分析

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-24 DOI: 10.1016/j.cap.2024.09.008

Asha Rani , Rajesh Parmar , R.S. Kundu

{"title":"Electrical characterization of lead-modified bismuth borovanadate glasses","authors":"Asha Rani , Rajesh Parmar , R.S. Kundu","doi":"10.1016/j.cap.2024.09.008","DOIUrl":"10.1016/j.cap.2024.09.008","url":null,"abstract":"<div><div>Specifically, the study looks into dielectric characteristics (<math><mrow><msup><mi>ε</mi><mo>′</mo></msup><mtext>and</mtext><mspace></mspace><msup><mi>ε</mi><mo>″</mo></msup></mrow></math>) and complex modulus formulation and AC conductivity of lead-modified bismuth borovanadate glasses (50-x) V2O5-40 B2O3-10 Bi2O3-xPbO, where x = 5,10, 15, 20 and 25 mol% with sample ID's VPb1, VPb2, VPb3, VPb4 & VPb5 according to different compositions of lead and vanadate. When the PbO content rises, there is a decreasing tendency in both the alternating current conductivity and dielectric constants. In order to fit AC conductivity data, Almond West equation is used to extract parameters, including crossover frequency (<math><mrow><msub><mi>ω</mi><mi>H</mi></msub></mrow></math>), frequency exponent (s), and direct current conductivity (<math><mrow><msub><mi>σ</mi><mrow><mi>d</mi><mi>c</mi></mrow></msub><mo>)</mo></mrow></math>. Direct current conduction mechanism in all glass samples except VPb5 [Correlated Barriers Hopping (CBH) conduction at all frequencies] at lower frequencies might potentially be attributed to large-polaron quantum mechanical tunneling (LQMT). Similar to this, at high frequencies, small polaron quantum mechanical tunnelling is followed by VPb2 & VPb3 while LQMT is followed by VPb1 & VPb4. Activation energy of dc conduction (<math><mrow><msub><mi>E</mi><mtext>dc</mtext></msub></mrow></math>) at higher frequencies (0.373–0.476 eV) for samples having sample ID VPb1 to VPb4 and sample VPb5 at all frequencies with <math><mrow><msub><mi>E</mi><mtext>dc</mtext></msub></mrow></math> 0.686 eV and modulus activation energy <math><mrow><mo>(</mo><msub><mi>E</mi><mi>R</mi></msub><mo>)</mo></mrow></math> (0.382–0.534 eV) are found in good agreement. Dielectric studies reveal non-Debye-type behaviour.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 151-158"},"PeriodicalIF":2.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358582","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

Understanding spin-dependent vibrational frequencies in Fe(II) metal organic coordination complexes 了解铁(II)金属有机配位配合物中自旋相关的振动频率

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-12 DOI: 10.1016/j.cap.2024.09.007

See-eun Tae , Ahmed Yousef Mohamed , Kosuke Kitase , Takafumi Kitazawa , Deok-Yong Cho

{"title":"Understanding spin-dependent vibrational frequencies in Fe(II) metal organic coordination complexes","authors":"See-eun Tae , Ahmed Yousef Mohamed , Kosuke Kitase , Takafumi Kitazawa , Deok-Yong Cho","doi":"10.1016/j.cap.2024.09.007","DOIUrl":"10.1016/j.cap.2024.09.007","url":null,"abstract":"<div>We investigated the compositional and temperature (T) dependences of vibrational frequencies in Hofmann-type Fe(L)2[M(CN)4] spin-crossover (SCO) coordination polymers in which {M = Ni, Pd or Pt with L = pyridine (py)}, or {L = 3-Cl-py or 3-methylpy with M = Ni}, using Raman spectroscopy. The SCO-driven peak shifts (in wavenumber) ranged up to ∼170 cm−1, manifesting significant spin-dependent structural evolutions. Furthermore, there appear clear HS signatures even at T ≪ TSCO for L = 3-Cl-py or 3-methylpy implying the steric effects of the organic ligands on the HS trapping. Meanwhile, for L = py, such HS trapping at the low temperature was not significant although some spectra taken under high laser fluence exhibit light-induced excited spin state trapping (LIESST) effect. The mechanism of the LIESST is discussed in detail in terms of the M d – C 2sp hybridization effects.</div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 138-143"},"PeriodicalIF":2.4,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243733","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

Magnetic properties of GdFeCo thin films tailored by sputtering conditions 通过溅射条件定制的钆钴合金薄膜的磁性能

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-11 DOI: 10.1016/j.cap.2024.09.006

Hanwool Seong , Won-Young Choi , Jongbum Choi , Duck-Ho Kim , Tae-Eon Park , Byoung-Chul Min , Heon-Jin Choi , Dong-Soo Han

{"title":"Magnetic properties of GdFeCo thin films tailored by sputtering conditions","authors":"Hanwool Seong , Won-Young Choi , Jongbum Choi , Duck-Ho Kim , Tae-Eon Park , Byoung-Chul Min , Heon-Jin Choi , Dong-Soo Han","doi":"10.1016/j.cap.2024.09.006","DOIUrl":"10.1016/j.cap.2024.09.006","url":null,"abstract":"<div>The unique properties of ferrimagnets including easy detection of their dynamic and static states, strong resistance to external disturbances, and rapid dynamic characteristics, have made them attractive in the spintronics community. Our study focuses on the engineering of these magnetic properties of ferrimagnets, particularly employing a GdFeCo alloy, a prominent ferrimagnetic material, by utilizing magnetron sputtering. A series of GdFeCo films are fabricated by altering their thicknesses and working pressure during the sputtering process. Our experimental results reveal that these sputtering parameters significantly influence a Gd composition within the films, which in turn affects critical properties of ferrimagnets such as magnetic anisotropy, and magnetic moment compensation temperature. By precisely controlling these sputtering parameters, we successfully tailored the magnetic properties of the GdFeCo thin films with desired properties, offering new possibilities for the creation of sophisticated magnetic materials tailored to specific technological needs.</div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 131-137"},"PeriodicalIF":2.4,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227941","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

Effect of bromine on the formation of δ-CsPbI3 in Cs0.22FA0.78Pb(I1-xBrx)3 perovskite solar cells 溴对 Cs0.22FA0.78Pb(I1-xBrx)3 包晶太阳能电池中 δ-CsPbI3 形成的影响

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2024-09-10 DOI: 10.1016/j.cap.2024.09.005

Muntae Hwang, Il-Wook Cho, Jaewon Oh, Hyunbok Lee, Mee-Yi Ryu

{"title":"Effect of bromine on the formation of δ-CsPbI3 in Cs0.22FA0.78Pb(I1-xBrx)3 perovskite solar cells","authors":"Muntae Hwang, Il-Wook Cho, Jaewon Oh, Hyunbok Lee, Mee-Yi Ryu","doi":"10.1016/j.cap.2024.09.005","DOIUrl":"10.1016/j.cap.2024.09.005","url":null,"abstract":"<div>Applying CsxFA1-xPbI3 perovskite is a useful strategy for synthesizing high-efficiency organic-inorganic lead halide perovskite solar cells because it improves the stability of the perovskite structure. High concentration of cesium (Cs) in CsFAPbI3 synthesized under ambient conditions typically lead to phase separation due to δ-CsPbI3 formation and moisture, thereby reducing light absorption and increasing non-radiative recombination. To counter this, we fabricated the mixed halide Cs0.22FA0.78Pb(I1-xBrx)3 perovskite films. Introducing bromine (Br) content effectively reduced the δ-CsPbI3 formation and grain boundaries, thus suppressing the non-radiative recombination between perovskite and charge transport layers. Employing this approach, our perovskite solar cells with a 10 % Br concentration achieved a power conversion efficiency of 15.81 %. This demonstrates the potential of Br incorporation in enhancing the stability and efficiency of perovskite solar cells.</div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"68 ","pages":"Pages 108-112"},"PeriodicalIF":2.4,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168889","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