Article
Chemistry, Physical
Renpeng Yang, Xiaogang Yu, Heng Li, Chao Wang, Chengwei Wu, Wei Zhang, Weihong Guo
Summary: Mg2+ substitution can increase the Curie temperature and specific saturation magnetization of the nanoparticles within a certain range, leading to improved heating efficiency and low cytotoxicity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Materials Science, Ceramics
Xiaogang Yu, Shuaiwen Ding, Renpeng Yang, Chengwei Wu, Wei Zhang
Summary: Magnetic induction hyperthermia is a new method for malignant tumor therapy that focuses on improving heating efficiency through increasing saturation magnetization and initial susceptibility of magnetic nanoparticles, adjusting particle size and magnetocrystalline anisotropy constant, and selecting an appropriate Curie temperature for self-regulation.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yifan Zheng, Renpeng Yang, Xiaogang Yu, Wei Zhang, Yue Shao
Summary: Magnetic induction hyperthermia is a new cancer treatment that targets tumor cells due to their poor heat resistance. Ferrite magnetic nanoparticles with spinel structures have been widely used in this treatment and can self-regulate the temperature. Substituting ions in the nanoparticles can effectively regulate their Curie temperature and heating efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Condensed Matter
Junaid Ul Ahsan, Harkirat Singh
Summary: The effects of nanoparticle size and core-shell ratio on the magnetization of Co@Fe spherical nanoparticles were studied, showing a decrease in ordering temperature with an increase in particle size. Additionally, the magnetization of the core-shell NPs was observed to increase with an increase in interfacial exchange energy between Fe and Co magnetic moments.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Inorganic & Nuclear
Chen Li, Ke Liu, Dequan Jiang, Cheng Jin, Tianyao Pei, Ting Wen, Binbin Yue, Yonggang Wang
Summary: This study reports materials with negative, zero, and positive thermal expansion behaviors, which are hexagonal CrTe, monoclinic Cr3Te4, and trigonal Cr5Te8 in NiAs-type defective Cr1-delta Te. These materials show obvious anisotropic thermal expansion and the properties are confirmed to be originated from the magnetovolume effect through magnetic measurements. The materials with similar compositions but different structures provide a new research direction for tuning the negative thermal expansion properties of materials and searching for materials with zero thermal expansion.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
S. Udhayakumar, G. Jagadish Kumar, E. Senthil Kumar, M. Navaneethan, K. Kamala Bharathi
Summary: The study investigated the magnetic anomalies of Sr-doped LiFe5O8 materials, showing that Sr doping leads to low-temperature magnetic anomalies and exhibits hard magnetic behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Wenxiao Shi, Jie Zheng, Zhe Li, Mengqin Wang, Zhaozhao Zhu, Jine Zhang, Hui Zhang, Yunzhong Chen, Fengxia Hu, Baogen Shen, Yuansha Chen, Jirong Sun
Summary: Artificial oxide heterostructures provide promising platforms for exploring emergent quantum phases, including the interesting phenomenon of interfacial magnetism between non-magnetic compounds. This study reports the emergence of a robust ferromagnetic phase at the (111)-oriented heterointerface between paramagnetic CaRuO3 and diamagnetic SrTiO3. The phase exhibits a high Curie temperature, large saturation magnetization, and tunable magnetic anisotropy.
Article
Chemistry, Physical
Santuan Zhao, Kaili Zhang, Zilin Zhang, Xiaofang Li, Bianyun Cai, Guangda Li
Summary: The novel magnetic cement shows good hyperthermia ability, enhanced radiopacity, non-toxicity to cells, and promotes cell adhesion and spreading.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xiaodong Si, Rui Zhang, Junwei Tan, Bingxin Ge, Yongsheng Liu
Summary: In this study, the hysteretic loss and evolution of magnetocaloric behavior in Mn1xCdxCoGe system were investigated. It was found that the replacement of Mn by Cd can regulate the Curie temperature without altering the crystal structure. The critical parameters extracted by different techniques reveal the long-range ordering magnetic interactions. The effect of increasing and decreasing fields on the temperature average entropy changes and normalized refrigerant capacity was also discussed to further explore the performance of magnetic refrigeration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
V. M. Andrade, N. R. Checca, V. G. de Paula, K. R. Pirota, A. L. Rossi, F. Garcia, A. Vovk, S. A. Bunyaev, G. N. Kakazei
Summary: In this study, Fe2CrAl Heusler nanoparticles with good crystallographic features were obtained using pulsed laser deposition technique. The structural, morphological, and magnetic properties of these nanoparticles were investigated, revealing slightly off-stoichiometric grains with two distinct morphologies. The magnetic behavior was found to be influenced by chemical disorder and inhomogeneity. The nanoparticles exhibited a superparamagnetic behavior and a Gilbert damping comparable to standard materials used in magnonics applications. The complex magnetostructural coupling in the nanoparticle system was discussed in comparison with the stoichiometric Fe2CrAl bulk target behavior.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yuxuan Sun, Huajian Zhang, Yong Zhao, Jiyang Wu, Yinbo Zhu, Mujun Li, Liu Wang
Summary: This study reports on locally reprogrammable and multifunctional magnetic micropillars. The micropillars are fabricated by dispersing CrO2 microparticles in an Ecoflex matrix, allowing for programming and reprogramming of magnetization by laser heating and applying a magnetic field. The magnetic micropillars exhibit a variety of deformation modes and demonstrate functionalities such as information encryption, particle pumping, ink mixing, and underwater crawling robotics.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Long Hou, Mingrui Li, Chao Jiang, Xingdu Fan, Qiang Luo, Shuangshuang Chen, Peidi Song, Weihuo Li
Summary: The partial substitution of Fe by Co in Fe83.2-xCoxB10C6Cu0.8 amorphous alloys expands the crystallization window, increases the Curie temperature, and affects the magnetic properties. Co doping regulates the first increase and then decrease of saturation magnetization, achieving a maximum value with 6 at.% Co doping. This study demonstrates the potential of Co doping in improving the magnetic properties of Fe-based amorphous alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Adam O'Neill, Sharidya Rahman, Zhen Zhang, Peggy Schoenherr, Tanju Yildirim, Bo Gu, Gang Su, Yuerui Lu, Jan Seidel
Summary: We demonstrate that the structural gradients found in strained nanoscale wrinkles in Cr2Ge2Te6 (CGT) can significantly increase the transition temperature (Tc), which is a key obstacle in using van der Waals materials for spintronic applications. This finding is supported by experimental evidence and ab initio studies, providing insights into the mechanism of enhanced magnetism and Tc.
Article
Materials Science, Multidisciplinary
Varnika Chaudhary, Harkirat Singh
Summary: Magnetic nanoparticles have gained importance in medical research, and the impact of temperature and particle size on magnetic properties needs to be better understood. This study focused on ferromagnetic Co@Fe core-shell nanoparticles and simulated their magnetization processes, finding that larger nanoparticles (20 nm) have higher effectiveness with a limited alternating magnetic field (AMF).
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Brahim Marfoua, Jisang Hong
Summary: By studying the magnetic and optical properties of 1T-VSe2 monolayer and WSe2/VSe2 heterostructure, an optically transparent two-dimensional magnetic material operating at room temperature with a high refractive index was discovered.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Applied
A. Hernandez-Minguez, F. Macia, J. M. Hernandez, J. Herfort, P. V. Santos
PHYSICAL REVIEW APPLIED
(2020)
Article
Robotics
Chuang Li, Garrett C. Lau, Hang Yuan, Aaveg Aggarwal, Victor Lopez Dominguez, Shuangping Liu, Hiroaki Sai, Liam C. Palmer, Nicholas A. Sather, Tyler J. Pearson, Danna E. Freedman, Pedram Khalili Amiri, Monica Olvera de la Cruz, Samuel I. Stupp
Article
Multidisciplinary Sciences
Skyler Wheaton, Victor Lopez-Dominguez, Hamid Almasi, Jialin Cai, Zhongming Zeng, Pedram Khalili Amiri, Hooman Mohseni
Summary: The paper introduces a tetherless optical tag that utilizes optical energy harvesting to achieve scalable self-powered devices with efficient data links and high data transmission rates. It also combines a spintronic microwave detector for converting RF waves to optical frequencies, demonstrating a proof-of-concept application.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Sevdenur Arpaci, Victor Lopez-Dominguez, Jiacheng Shi, Luis Sanchez-Tejerina, Francesca Garesci, Chulin Wang, Xueting Yan, Vinod K. Sangwan, Matthew A. Grayson, Mark C. Hersam, Giovanni Finocchio, Pedram Khalili Amiri
Summary: There is growing interest in using antiferromagnetic materials for memory devices, with recent studies showing complications in interpreting resistive switching signals generated by high current densities in antiferromagnetic/heavy metal bilayers. Arpaci et al have introduced an experimental protocol to distinguish between magnetic and nonmagnetic switching signals in such structures, showcasing their method in IrMn3/Pt devices. The researchers utilized a six-terminal double-cross device to demonstrate reversible switching in the presence of IrMn3, effectively eliminating any non-magnetic switching artifacts.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Zhenyi Zheng, Yue Zhang, Victor Lopez-Dominguez, Luis Sanchez-Tejerina, Jiacheng Shi, Xueqiang Feng, Lei Chen, Zilu Wang, Zhizhong Zhang, Kun Zhang, Bin Hong, Yong Xu, Youguang Zhang, Mario Carpentieri, Albert Fert, Giovanni Finocchio, Weisheng Zhao, Pedram Khalili Amiri
Summary: This study demonstrates bias-field-free switching of perpendicular ferrimagnets through the use of vertical composition gradient, which induces intrinsic SOTs and gradient-driven DMI to break in-plane symmetry during the switching process. The research provides a novel strategy for designing efficient and compact SOT devices for perpendicular ferrimagnetic materials.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Riccardo Tomasello, Roman Verba, Victor Lopez-Dominguez, Francesca Garesci, Mario Carpentieri, Massimiliano Di Ventra, Pedram Khalili Amiri, Giovanni Finocchio
Summary: We theoretically demonstrate that voltage-controlled magnetic anisotropy (VCMA) can excite linear and parametric resonant modes in easy-axis antiferromagnets (AFMs), and it is more efficient than other methods. This has important implications for the efficient electrical control of the Neel vector and the detection of high-frequency dynamics.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Zedong Hu, Yixin Shao, Victor Lopez-Dominguez, Pedram Khalili Amiri
Summary: This study proposes and numerically investigates a skyrmionic-magnon-switch (SMS) device, in which a Neel-type skyrmion is used as a programmable scattering center to route spin waves. The results show that the deflection of magnons by a skyrmion strongly depends on the ratio of magnon wavelength to skyrmion diameter. This offers the potential to control the routing of magnons in a network of ferromagnetic wires.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Victor Lopez-Dominguez, Yixin Shao, Pedram Khalili Amiri
Summary: The integration of embedded MRAM technology in mainstream semiconductor manufacturing provides an opportunity for computing systems with improved performance, energy efficiency, and lower cost. The focus of MRAM research is shifting towards alternative write mechanisms and new materials. This Perspective explores the spin-orbit torque as a write mechanism for MRAM devices and discusses progress in developing SOT-MRAM devices with perpendicular magnetization, as well as the challenges and potential applications of these devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Carla Cirillo, Marc Rovirola, Carla Gonzalez, Blai Casals, Joan Manel Hernandez, Ferran Macia, Antoni Garcia-Santiago, Carmine Attanasio
Summary: Ferromagnetic resonance (FMR) spectroscopy measurements were conducted on NbRe/Co/NbRe trilayers to investigate spin pumping across the superconductor/ferromagnet interface and the presence of spin-triplet pairing in the superconducting NbRe layer. The FMR spectra showed that the Gilbert damping parameter associated with spin pumping remains almost constant during the superconducting transition. The dependence of the Gilbert damping parameter on the thickness of the NbRe layer was used to determine the values of the spin mixing conductance and the spin diffusion length in the NbRe layer.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yixin Shao, Christian Duffee, Eleonora Raimondo, Noraica Davila, Victor Lopez-Dominguez, Jordan A. Katine, Giovanni Finocchio, Pedram Khalili Amiri
Summary: Probabilistic computing is a physics-based approach to solving computational problems that are challenging for traditional computers. Researchers propose a new design for probabilistic bits using perpendicular MTJs and the VCMA effect for random state and fast random number generation. Experimental results demonstrate the feasibility and high-quality random number generation capability of this design.
Article
Physics, Applied
Marc Rovirola, M. Waqas Khaliq, Blai Casals, Michael Foerster, Miguel Angel Nino, Lucia Aballe, Jens Herfort, Joan Manel Hernandez, Ferran Macia, Alberto Hernandez-Minguez
Summary: This study utilizes the coupling mechanism of surface acoustic waves (SAWs) in micro- and nanoscale systems to measure the amplitude of magnetoacoustic waves generated by SAWs using magnetic imaging. Experimental and simulation results confirm the observation of resonant and non-resonant magnetoelastic coupling in Fe3Si, and quantify the magnetoelastic shear strain component.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Yixin Shao, Victor Lopez-Dominguez, Noraica Davila, Qilong Sun, Nicholas Kioussis, Jordan A. Katine, Pedram Khalili Amiri
Summary: Magnetic random-access memory (MRAM) based on voltage-controlled magnetic anisotropy in magnetic tunnel junctions (MTJs) offers lower power consumption, higher bit density, and smaller access transistor size compared to conventional current-controlled spin-transfer torque MRAM. Researchers have achieved sub-nanosecond switching in nanoscale MTJs by utilizing high voltage-controlled magnetic anisotropy coefficient, paving the way for future development of voltage-controlled MRAMs and spintronic devices.
COMMUNICATIONS MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Yixin Shao, Sisilia Lamsari Sinaga, Idris O. Sunmola, Andrew S. Borland, Matthew J. Carey, Jordan A. Katine, Victor Lopez-Dominguez, Pedram Khalili Amiri
Summary: This study introduces a method to use magnetic tunnel junctions as true random number generators in hardware for stochastic computing, adjusting the random bit streams through spin-transfer torque with ultralow currents, achieving 95% accuracy for handwritten digit recognition. This approach provides a promising solution for ultra-low-power machine learning in edge, mobile, and IoT devices.
IEEE MAGNETICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Riccardo Tomasello, Luis Sanchez-Tejerina, Victor Lopez-Dominguez, Francesca Garesci, Anna Giordano, Mario Carpentieri, Pedram Khalili Amiri, Giovanni Finocchio
Article
Materials Science, Multidisciplinary
Jan Albert, Ferran Macia, Joan Manel Hernandez