Article
Engineering, Electrical & Electronic
B. L. Choudhary, Upendra Kumar, A. M. Quraishi, P. M. Z. Hasan, Reem Darwesh, Sudhish Kumar, S. Dalela, Shalendra Kumar, S. N. Dolia, P. A. Alvi
Summary: This article reports the domain size-controlled magnetic behavior of La0.67Ca0.33MnO3 perovskite prepared by solid state reaction. Structural information was obtained through Rietveld refinement of X-ray diffraction analysis, showing the orthorhombic structure with specific lattice parameters. Additionally, surface morphological study confirmed elemental composition consistent with experimental values obtained by EDAX measurements. Magnetic properties were measured using SQUID, with M-T measurements indicating the impact of external magnetic field on internal magnetic field, and M-H measurements showing the variation of magnetization at different temperatures within +/- 5 T. The Curie temperature was found to be 212 K, and a sharp peak in dM/dT at 183 K suggested thermal energy disrupting magnetic domain energy alignment.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexei A. Belik, Dmitry D. Khalyavin, Yoshitaka Matsushita, Kazunari Yamaura
Summary: A new member of A-site columnar-ordered A(2)A'A'' B4O12 quadruple perovskites Y2CuGaMn4O12 prepared by a high-pressure, high-temperature method exhibits long-range ferrimagnetic order and anisotropic thermal expansion. The Cu2+ doping significantly changes the magnetic properties, affecting the ordering.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zechao Zhuang, Yong Li, Yihang Li, Jiazhao Huang, Bin Wei, Rong Sun, Yujing Ren, Jie Ding, Jiexin Zhu, Zhiquan Lang, Lyudmila Moskaleva, Chuanxin He, Yu Wang, Zhongchang Wang, Dingsheng Wang, Yadong Li
Summary: The study demonstrates that controlling the atomic dispersion in oxide lattice can enhance the ORR activity, achieving a five-fold improvement in ORR activity in the La2Co2+Mn4+O6 double perovskite. This opens up new possibilities for controlling the oxygen reduction reaction in strongly correlated oxides.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Jing Luo, Gia-Wei Chern
Summary: Extensive large-scale dynamical simulations of phase-separated states in the double exchange model are presented in this study. The dynamical structure factors of nanoscale textures under different doping levels are computed, revealing dynamical signatures of various magnetic structures. Implications for experiments on magnetoresistive manganites are discussed based on the results.
Article
Chemistry, Inorganic & Nuclear
Yongjin Shin, James M. Rondinelli
Summary: This study explores the epitaxial-strain-induced phase transitions in thin films of SrMnO2.5 and SrFeO2.5, with SrMnO2.5 exhibiting multiple magnetic transitions depending on strain state, while no magnetic transitions occur in SrFeO2.5. The dependency on the transition-metal configuration and the relative orientation of oxygen vacancies is explained. The findings suggest that compressive and tensile strain can tune the unit cell structure to stabilize different combinations of magnetic spin orders.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Z. L. Sun, A. F. Wang, H. M. Mu, H. H. Wang, Z. F. Wang, T. Wu, Z. Y. Wang, X. Y. Zhou, X. H. Chen
Summary: Researchers have discovered a colossal anisotropic magnetoresistance (AMR) with a value reaching 1.84 x 10(6)% at 2 K in the nearly Dirac material EuMnSb2, which stems from the field-induced metal-to-insulator transition (MIT). This suggests that antiferromagnetic topological materials can be a valuable resource for spintronics applications.
NPJ QUANTUM MATERIALS
(2021)
Article
Physics, Multidisciplinary
Young Woo Choi, Hyoung Joon Choi
Summary: Graphene moire superlattices exhibit varying electron-phonon coupling strengths in different flat bands, showcasing a correlation between strong electron-phonon coupling and observed robust superconductivity. The presence of sublattice polarization in certain moire flat bands may suppress intersublattice electron-phonon matrix elements, potentially leading to weaker or absent superconductivity. Nonadiabatic superconducting transition temperatures T-c obtained from calculations are in good agreement with experimental results.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Ihor Cherniukh, Gabriele Raino, Thilo Stoeferle, Max Burian, Alex Travesset, Denys Naumenko, Heinz Amenitsch, Rolf Erni, Rainer F. Mahrt, Maryna I. Bodnarchuk, Maksym V. Kovalenko
Summary: Through precise structural engineering, perovskite nanocrystals are co-assembled with other nanocrystal materials to form a range of binary and ternary perovskite-type superlattices that exhibit superfluorescence. These ABO3 superlattices, as well as the binary NaCl and AlB2 superlattice structures that we demonstrate, exhibit a high degree of orientational ordering of the CsPbBr3 nanocubes. They also exhibit superfluorescence – a collective emission that results in a burst of photons with ultrafast radiative decay (22 picoseconds) that could be tailored for use in ultrabright (quantum) light sources.
Article
Engineering, Electrical & Electronic
Lisa Zhou, Guoqiang Song, Yuanyuan Zhang, Qingqing Liu, Sheng Li, Jing Yang, Wei Bai, Xiaodong Tang
Summary: The PCMO thin films grown on SrTiO3 and LaAlO3 substrates prepared using the sol-gel method exhibit significant changes in magnetic and field behaviors due to tensile and compressive stress, showing strong anisotropic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Yiyi He, Yi-Xin You, Lingyong Zeng, Shu Guo, Huawei Zhou, Kuan Li, Yanhao Huang, Peifeng Yu, Chao Zhang, Chao Cao, Huixia Luo
Summary: We report the effect of Pt doping on the superconductivity in CuRh2Se4 spinel using a combined experimental and theoretical study. Our results show that Pt doping can enhance the superconducting transition temperature and influence the magnetic field response of Cu(Rh1-xPtx)2Se4. Theoretical calculations further confirm the experimental observations.
Article
Materials Science, Multidisciplinary
Fatih Denbri, Nabil Mahamdioua, Faiza Meriche, Nevin Soylu Koc, Cabir Terzioglu, Ahmet Varilci, Sevgi Polat Altintas
Summary: The study investigated the structural, microstructural, and magneto-transport properties of polycrystalline La0.5Sm0.2Ca0.3-x PbxMnO3 samples, revealing the significant impact of Pb doping on their resistivity and magnetoresistance properties. Additionally, it was found that the lattice parameters of the samples increase with higher Pb content.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Zeliang Ren, Bin Lao, Xuan Zheng, Lei Liao, Zengxing Lu, Sheng Li, Yongjie Yang, Bingshan Cao, Lijie Wen, Kenan Zhao, Lifen Wang, Xuedong Bai, Xianfeng Hao, Zhaoliang Liao, Zhiming Wang, Run-Wei Li
Summary: This study reports the epitaxial growth of magnetic insulator films with strong perpendicular magnetic anisotropy and their potential application in spintronic devices. The films exhibit high crystalline quality, ferrimagnetic and insulating transport characteristics, as well as pronounced spin Hall magnetoresistance and spin Hall-like anomalous Hall effect in constructed heterostructures.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Shanshan Guo, Baomin Wang, Daniel Wolf, Axel Lubk, Weixing Xia, Mingkun Wang, Yao Xiao, Junfeng Cui, Dhanapal Pravarthana, Zehua Dou, Karin Leistner, Run-Wei Li, Ruben Huehne, Kornelius Nielsch
Summary: This study successfully achieved hierarchical La0.7Sr0.3MnO3 thin films with well-defined crystallographic orientations, which significantly broadened the temperature range of the magnetic transition and extended the working window of colossal magnetoresistance. The findings suggest a promising approach for altering magnetic transitions and enhancing phase-transition-related effects in functional oxides.
Article
Multidisciplinary Sciences
Maciej Wiesner, Kristie Koski, Antti Laitinen, Juuso Manninen, Alexander A. Zyuzin, Pertti Hakonen
Summary: We investigated charge and heat transport in copper-intercalated topological insulator Bi2Se3 hybrid devices. Quantum corrections, electron-electron, and electron-phonon interactions were observed in the measured conductivity. Our shot noise measurements revealed a crossover in the heat flux between T-2 and T-4 as temperature increased, possibly due to inelastic electron scattering on disorder and the increased role of transverse acoustic phonons in the electron-phonon coupling process.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Jiashu Wang, William Powers, Zhan Zhang, Michael Smith, Bradlee J. McIntosh, Seul Ki Bac, Logan Riney, Maksym Zhukovskyi, Tatyana Orlova, Leonid P. Rokhinson, Yi-Ting Hsu, Xinyu Liu, Badih A. Assaf
Summary: This study investigates the behavior of candidate topological superconductor Sn1-xInxTe thin films in the presence of quantum confinement and lattice strain. The results reveal the coexistence of quantum interference effects and superconducting fluctuations above the critical temperature T-c. The analysis of normal state magnetoresistance indicates a transition from weak antilocalization to localization in the superconducting samples, suggesting that superconductivity primarily originates from charge carriers occupying trivial states. Additionally, a significant enhancement of conductivity is observed above T-c, indicating the presence of superconducting fluctuations.
