Article
Materials Science, Multidisciplinary
Ramasis Goswami, Syed B. Qadri
Summary: In this study, we investigated the effect of interfacial strain on the microstructure, interfaces and phase-formation behavior in epitaxially grown Fe films. Our results showed that films with higher thicknesses exhibited an equilibrium alpha-Fe phase, while thinner films transformed the metastable delta-Fe phase to an equilibrium alpha-Fe phase through annealing.
Article
Nanoscience & Nanotechnology
M. Kawano, K. Hirama, K. Kumakura
Summary: We investigated the magnetic properties of Fe nanoparticles embedded in diamond (111) thin films. The Fe nanoparticles have body-centered cubic structures with median particle diameters ranging from 9 to 26 nm. Magnetization measurements revealed that these particles exhibit large magnetic anisotropy and undergo a transition from ferromagnetic to superparamagnetic state at blocking temperatures between 480 and around 1000 K, depending on their particle diameters. These magnetic properties are well explained by coherent magnetization rotation models proposed by Stoner-Wohlfarth and Neel.
Article
Chemistry, Multidisciplinary
Byung Il Yoo, Nahyun Lee, Bipin Lamichhane, Joonho Bang, Hyun Yong Song, Byung Cheol Park, Kyu Hyoung Lee, Seong-Gon Kim, Sung Wng Kim
Summary: This study investigates the electronic and magnetic properties of quasi-2D layer-structured I-Mn-V compounds and analyzes their correlation with structural parameters. The study reveals that the variation in the bonding angle between V-Mn-V affects the orbital hybridization and the anisotropic semiconducting properties of Mn and V. The study also finds anisotropy in the magnetic properties.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Himalay Basumatary, J. Arout Chelvane, D. V. Sridhara Rao, A. Talapatra, J. Mohanty, Deepak Kumar, Vajinder Singh, S. Kamat, Rajeev Ranjan
Summary: This study investigated the magnetic behavior of Tb-Fe thin films with different thicknesses, revealing the presence of out-of-plane magnetic anisotropy in these films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
J. Gil-Monsalve, J. E. Abrao, E. Santos, A. Ricalde, A. Azevedo, O. Arnache
Summary: This study investigated the magnetic properties of ZnFe2O4 films grown on different substrates using ferromagnetic resonance (FMR) technique. The results showed that the anisotropy of the samples depends on the type of substrate. By analyzing the FMR data, various parameters related to the magnetic properties were extracted. The magnetic response obtained by FMR was compared with the results from a vibrating sample magnetometer.
Article
Physics, Applied
A. Roman, A. Lopez Pedroso, K. Bouzehouane, J. E. Gomez, A. Butera, M. H. Aguirre, M. Medeiros Soares, C. Garcia, L. B. Steren
Summary: The competition between shape and perpendicular magnetic anisotropies in magnetic thin films leads to unconventional magnetic behaviors. In ferromagnetic thin films, the out-of-plane component of magnetic anisotropy can induce a transition from planar to stripe-like magnetic domains above a critical thickness, tc. This article presents a detailed study of the magnetization switching mechanism in FePt thin films where this phenomenon is observed. Micromagnetic simulations and experiments show that below tc, the reversal mechanism is well described by the two-phase model, while above this thickness, the magnetization within each stripe reverses through coherent rotation. The out-of-plane component and its temperature dependence of the magnetic anisotropy were also analyzed, indicating that substrate-induced strains are responsible for the abnormal coercive field behavior observed for FePt films with t > tc.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Luis A. Cipriano, Giovanni Di Liberto, Sergio Tosoni
Summary: The study shows that the interface formed by indium phosphide and titania thin films is stabilized by In-O and Ti-P chemical bonds, resulting in a staggered type-II heterojunction which has significant implications for photocatalysis.
SOLID-STATE ELECTRONICS
(2021)
Article
Multidisciplinary Sciences
Xin Yu Zheng, Sanyum Channa, Lauren J. Riddiford, Jacob J. Wisser, Krishnamurthy Mahalingam, Cynthia T. Bowers, Michael E. McConney, Alpha T. N'Diaye, Arturas Vailionis, Egecan Cogulu, Haowen Ren, Zbigniew Galazka, Andrew D. Kent, Yuri Suzuki
Summary: This study introduces a ferromagnetic insulator spinel, Li0.5Al1.0Fe1.5O4 (LAFO), with low magnetic damping, perpendicular magnetic anisotropy, and no magnetic dead layer. By integrating these LAFO films with epitaxial Pt spin source layers, record low magnetization switching currents and high spin-orbit torque efficiencies are achieved.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Mio Ishibashi, Kay Yakushiji, Masashi Kawaguchi, Arata Tsukamoto, Satoru Nakatsuji, Masamitsu Hayashi
Summary: The magnetic properties of rare earth-transition metal ferrimagnetic thin films are studied. It is found that the compensation of magnetic moments of rare earth and transition metal sublattices increases with decreasing film thickness. For thin TbFeCo films, Tb atoms do not contribute to the magnetization. The perpendicular magnetic anisotropy increases with a thin Co layer but drops to zero with a thin Tb layer. The Tb concentration at which magnetic compensation occurs decreases when the underlayer is changed from Pt to Ta.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Aleksei Grunin, Sergey Shevyrtalov, Ksenia Chichay, Olga Dikaya, Nadezhda Barkovskaya, Denis Danilov, Aleksander Goikhman
Summary: Thin Fe3Si films grown on Si/SiO2 substrates using ion-beam and pulsed laser deposition exhibit soft ferromagnetic behavior and strong in-plane uniaxial magnetic anisotropy. The presence and character of the anisotropy are not affected by the material of the capping layer or the deposition of the buffer layer. The structure of the Fe3Si film depends on the type of substrate used.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Nehru Devabharathi, Rajasekar Parasuraman, Arun M. Umarji, Subho Dasgupta
Summary: High surface-to-volume ratio fully-printed chemiresistive-type ethanol gas sensors based on mesoporous tin oxide were fabricated using a soft templating method. The sensors exhibited highly selective sensitivity towards ethanol with short response and recovery times. The optimal pore size range contributed to the high surface area and volume of the sensors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Peter Swekis, Aleksandr S. Sukhanov, Yi-Cheng Chen, Andrei Gloskovskii, Gerhard H. Fecher, Ioannis Panagiotopoulos, Jorg Sichelschmidt, Victor Ukleev, Anton Devishvili, Alexei Vorobiev, Dmytro S. Inosov, Sebastian T. B. Goennenwein, Claudia Felser, Anastasios Markou
Summary: This study investigates the structural, magnetic, and electronic properties of magnetic Weyl semimetal thin films of Co2MnGa, revealing the impact of film thickness on structural and magnetic properties, and providing experimental insights into the electronic and magnetic properties of magnetic Weyl semimetal thin films.
Article
Physics, Applied
Miela J. Gross, Walid A. Misba, Kensuke Hayashi, Dhritiman Bhattacharya, Daniel B. Gopman, Jayasimha Atulasimha, Caroline A. Ross
Summary: Voltage-tuning of magnetic anisotropy is demonstrated in this study, showing the mechanism behind this phenomenon using a piezoelectric substrate.
APPLIED PHYSICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Fan Cui, Yunyan Zhang, H. Aruni Fonseka, Premrudee Promdet, Ali Imran Channa, Mingqing Wang, Xueming Xia, Sanjayan Sathasivam, Hezhuang Liu, Ivan P. Parkin, Hui Yang, Ting Li, Kwang-Leong Choy, Jiang Wu, Christopher Blackman, Ana M. Sanchez, Huiyun Liu
Summary: The use of a thin layer of TiO2 deposited by atomic layer deposition can provide robust protection to III-V semiconductor nanowires, enhancing both their stability and performance in water-splitting applications. The protected nanowires showed improved photoluminescence intensity retention, higher photocurrent density, and a record-long highly stable performance compared to unprotected counterparts, demonstrating the effectiveness of the TiO2 layer as a protective coating.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
R. K. Basumatary, H. Basumatary, M. M. Raja, R. Brahma, S. K. Srivastava
Summary: FePtCo ternary alloy films were prepared on Si-substrate by co-sputtering of Co with FePt under three different conditions. The surface roughness, crystal structure, and magnetic properties of these films were investigated. The results showed that the films had varying surface roughness and crystallized in a close-packed FCC structure. The magnetic measurement indicated that the films exhibited low coercivity and excellent in-plane magnetic anisotropy, with the values of saturation magnetization and effective anisotropy energy changing with Co content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)