Article
Engineering, Electrical & Electronic
Mansour Mohamed, A. Sedky, Abdullah S. Alshammari, Mohamed Gandouzi
Summary: The study shows that with increasing Ni doping in Zn1-xNixO samples, changes occur in the crystal structure, optical properties, and ferromagnetic properties. Additionally, Ni affects the absorption spectra, luminescence properties, and some optical constants, including conductivity and electromagnetic parameters.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Lun Jin, Danrui Ni, Xin Gui, Daniel B. Straus, Qiang Zhang, Robert J. Cava
Summary: The authors successfully doped Sr2GaSbO6, a magnetically silent double perovskite semiconductor, with magnetic trivalent cation Mn3+ to induce ferromagnetism and tune its bandgap. The new material, Sr2Ga1-xMnxSbO6 double perovskite, exhibits tunable ferromagnetic ordering temperature and bandgap, suggesting its potential application in next-generation oxide-based spintronic devices.
Article
Engineering, Electrical & Electronic
Yuhan Wu, Guofan Duan
Summary: BiFeO3 (BFO) and Mn-doped BFO were prepared via the sol-gel method and exhibited excellent properties. X-ray diffraction confirmed the purity of the BFO phase and successful doping of Mn. X-ray photoelectron spectroscopy analysis indicated the extent of Mn doping and the enhancement of Fe3+ ion concentration. Scanning electron microscopy and transmission electron microscopy revealed the morphology and size variations of the nanoparticles with different Mn doping concentrations. Mn-doping significantly influenced the ferromagnetic behavior of BFO-based nanoparticles by affecting the spin cycloid structure and super-exchange interaction. The photocatalytic performance of Mn-doped BFO nanoparticles was also investigated, highlighting their potential application in photocatalysis.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zulfiqar, Saeed Ur Rahman, Tahirzeb Khan, Rajwali Khan, Gulzar Khan, Shaukat Khattak, Nasir Rahman, Shahid Ali, Tang Hua
Summary: Different nanoparticles (NPs) were prepared using the co-precipitation route, with Co and Ni incorporated into the SnO2 matrix. The XRD data showed a reduction in crystallite size and an increase in oxygen vacancies concentration with higher Co content. The dielectric properties were strongly influenced by doping, with S4 NPs exhibiting the highest values for dielectric loss factor and AC conductivity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Yi Zhou, Qing He, Fei Zhou, Yong Liu, Zhonghong Lai, Yudong Huang, Jingchuan Zhu
Summary: This study reports a strong room-temperature magnetism in Ni-doped BaNbO3, demonstrating the impact of Ni-doping on short-range magnetic order and strong local spin polarization effects at room temperature through the preparation of nano-powders.
Article
Chemistry, Physical
Shivani Jindal, Puneet Sharma
Summary: In this study, hydrothermally synthesized transition metal and rare earth doped ZnS nanoparticles were investigated for their structural, morphological, optical, and magnetic properties. The nanoparticles showed tunable optical band gaps and ferromagnetic nature, with potential applications in optoelectronic and spintronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ru Li, Huijuan Sun, Chao Zhang, Mingjia Zhang, Xiaodong Li, Ze Yang, Xiaodi Ma, Changshui Huang
Summary: The study shows that a convenient and effective route has been developed to prepare carbon-based magnetic semiconductors by modifying with transition metal elements, with Co-GDY showing the most outstanding ferromagnetism. Spin-polarized DFT calculations further confirm that the robust ferromagnetism of Co-GDY arises from the most significant local magnetic moment.
Article
Engineering, Electrical & Electronic
J. El Ghoul, N. Abdel All, G. Khouqeer, M. S. Alshammari
Summary: In this study, Zn0.9-xNi0.1AlxO nanoparticles were synthesized by sol-gel method and their structural, optical, and magnetic properties were investigated. The results showed that bandgap values decreased with increasing Al concentration, oxygen vacancies affected emission spectra, and magnetic properties exhibited ferromagnetism at low temperatures.
JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Liqiong Shao, Aimin Sun, Yanchun Zhang, Lichao Yu, Nanzhaxi Suo, Zhuo Zuo
Summary: The Ni-Mg-Co magnetic ferrite nanoparticles doped with Al3+, La3+, Ce3+, Pr3+ and Sm3+ exhibit a single-phase spinel structure, with decreases in average crystallite size after rare-earth ion doping and an increase in size after Al3+ doping. The magnetic properties, including remanent magnetization, square degree, coercivity rectangle degree and anisotropy constant, all show variations after doping with rare-earth ions and Al3+.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Seok Joon Yun, Byeong Wook Cho, Thapa Dinesh, Dae Hee Yang, Yong In Kim, Jeong Won Jin, Sang-Hyeok Yang, Tuan Dung Nguyen, Young-Min Kim, Ki Kang Kim, Dinh Loc Duong, Seong-Gon Kim, Young Hee Lee
Summary: This research demonstrates the enhancement of ferromagnetism in vanadium-doped WSe2 monolayer by tailoring complex configurations of Se vacancies. The structural analysis of atomic defects using transmission electron microscopy confirms the increased magnetic order after high-temperature heat-treatment. The pairing of vanadium and Se vacancies is predicted to promote ferromagnetism through spin flip by electron transfer.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lan-Anh T. Nguyen, Krishna P. Dhakal, Yuhan Lee, Wooseon Choi, Tuan Dung Nguyen, Chengyun Hong, Dinh Hoa Luong, Young-Min Kim, Jeongyong Kim, Myeongwon Lee, Taeyoung Choi, Andreas J. Heinrich, Ji-Hee Kim, Donghun Lee, Dinh Loc Duong, Young Hee Lee
Summary: The study reveals an anomalous circularly polarized photoluminescence phenomenon in V-doped two-dimensional transition metal dichalcogenides, which is caused by the coupling of excitons with V-induced spin-polarized holes.
Article
Crystallography
Najam ul Hassan, Mohsan Jelani, Ishfaq Ahmad Shah, Khalil Ur Rehman, Abdul Qayyum Khan, Shania Rehman, Muhammad Jamil, Deok-kee Kim, Muhammad Farooq Khan
Summary: This research successfully increased the martensitic transformation temperature of Ni43Mn46-x SmxSn11 alloys through Sm doping, resulting in a significant magnetocaloric effect near room temperature. The alloys also exhibited a first-order magnetostructural transition with high magnetic entropy change and refrigeration capacity under a magnetic field variation of 0-5 T.
Article
Engineering, Electrical & Electronic
Gururaj Hosamani, B. N. Jagadale, J. Manjanna, S. M. Shivaprasad, D. K. Shukla, J. S. Bhat
Summary: Nanoparticles of (In1-xDyx)(2)O-3 (x = 0, 0.05, 0.10) with a cubic bixbyite structure were obtained by auto-combustion method. Doping Dy into In2O3 increased the optical band gap and resulted in emission in the yellow region, but it is not suitable for dilute magnetic semiconductors in spintronic devices.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Sheraz Khan, Bingsuo Zou, Shangfei Yao, Arfan Bukhtiar, WeiGuo Huang, Zhijie Zhou
Summary: Future information technology depends on spin-related optical properties, which currently lack a deep understanding in diluted magnetic semiconductors (DMS). In this study, we use first-principles calculations to investigate the magnetic and opto-electronic properties of Fe(II)-doped ZnTe. The results reveal a change from non-magnetic to magnetic ground state in Fe(II)-doped ZnTe, along with a competing ferro-and anti-ferromagnetic behavior. The introduction of an electron by Al co-doping modifies the most stable configuration and results in an estimated curie temperature above room temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Physical
Carmine Autieri, Giuseppe Cuono, Canio Noce, Milosz Rybak, Kamila M. Kotur, Clio Efthimia Agrapidis, Krzysztof Wohlfeld, Magdalena Birowska
Summary: We present a systematic study of the electronic and magnetic properties of two-dimensional ordered alloys, and find that both direct exchange and superexchange models can explain the magnetic couplings in the hosts and doped systems. Magnetic impurities do not affect the magnetic ordering in the pure phases, and frustration in antiferromagnetic coupling may lead to lower magnetic ordering temperature in doped systems.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)