Article
Multidisciplinary Sciences
Korbinian Baumgaertl, Dirk Grundler
Summary: Spin wave based computing offers advantages of low power consumption and absence of joule heating, but the lack of a direct method for storing spin wave information is a challenge. The authors demonstrate the reversal of nanomagnets using spin waves with small power requirements.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Yan Duan, Lorena E. Rosaleny, Joana T. Coutinho, Silvia Gimenez-Santamarina, Allen Scheie, Jose J. Baldovi, Salvador Cardona-Serra, Alejandro Gaita-Arino
Summary: Three decades of research in molecular nanomagnets have led to significant progress in magnetic memory. By choosing the right magnetic ion and coordination environment, researchers have achieved magnetic memory at liquid nitrogen temperature. Through data collection and statistical analysis, the study reveals the correlation between the Arrhenius energy barrier and magnetic memory, providing insights for chemically driven design to reduce relaxation rates.
NATURE COMMUNICATIONS
(2022)
Review
Nanoscience & Nanotechnology
Bivas Rana, Amrit Kumar Mondal, Supriyo Bandyopadhyay, Anjan Barman
Summary: When magnets are miniaturized into nanoscale elements, they exhibit various physics phenomena and potential applications. This review discusses recent discoveries of these phenomena and their applications, highlighting the driving factors, underlying system dynamics, manipulation techniques, and specific features that can be utilized for technological advancements. The advantages and disadvantages of nanomagnet-based devices and systems are also pointed out, along with suggestions for future investigations to explore intriguing phenomena and facilitate traditional and non-traditional applications.
Review
Nanoscience & Nanotechnology
Bivas Rana, Amrit Kumar Mondal, Supriyo Bandyopadhyay, Anjan Barman
Summary: This article discusses dynamical phenomena in nanomagnets, particularly focusing on magnetization reversal and its digital applications. It then explores wave-like phenomena in nanomagnets, with an emphasis on spin waves in various nanomagnetic systems and methods for controlling magnetization dynamics in nanomagnet arrays for analog applications. The article concludes with a discussion of interesting spintronic phenomena that underlie the diverse physics observed in nanomagnet assemblies.
Article
Materials Science, Multidisciplinary
Akhila Priya Kotti, Rahul Sahu, Amaresh Chandra Mishra
Summary: The magnetization reversal mechanism and stable remanent states of truncated conical nanowires with high aspect ratio are investigated using micromagnetic simulation. The axial magnetization reversal is mainly driven by domain wall motion, which is hindered by increasing tapering of the nanowire. The remanent state shows a homogeneous magnetization throughout the nanowire, except at the ends where vortex states appear for near cylindrical nanowires and a flower state is exhibited for nanowires with small top radius. The control of magnetization reversal is achieved by restricting the movement of domain wall through a tapered end with flower configuration.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Tian-Chi Ji, Min-Xiang Pan, Hong-Liang Ge, Qiong Wu, Zhang Pengyue
Summary: The present work investigated the magnetization reversal behavior of Zr-doped (Nd0.8Ce0.2)(2)Fe12Co2-xZrxB (x = 0, 0.5) permanent alloys with high coercivity, showing that the Zr-doped sample exhibits higher magnetic properties and its reverse process can be explained by the pinning model.
Article
Chemistry, Physical
Qizhong Zhao, Fanghua Tian, Tieyan Chang, Kaiyan Cao, Dingchen Wang, Yin Zhang, Chao Zhou, Xiaoqin Ke, Wenliang Zuo, Yu Wang, Sen Yang, Xiaoping Song
Summary: In this study, the magnetization reversal phenomenon in the Ni20Mn3B6 alloy was investigated at low applied fields, revealing two compensation temperatures. The first temperature is attributed to competition between Mn atoms at different positions, while the second arises from moment rotation to satisfy Zeeman energy. This phenomenon enables tunable switching of magnetization between positive and negative values, providing potential applications in spintronic devices and magnetic storage materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Shivani Sharma, Pavitra N. Shanbhag, Fabio Orlandi, Pascal Manuel, Sean Langridge, Devashibhai Adroja, Milan K. Sanyal, Athinarayanan Sundaresan
Summary: The study revealed the coexistence of C-type and G-type antiferromagnetic ordering in polycrystalline YVO3 at 115K, with the G-type phase growing at the expense of the C-type phase on cooling until it ceases at around 77K. Symmetry analysis showed different origins for the Dzyaloshinskii-Moriya interaction in each phase, possibly explaining the observed magnetization reversal between TN and TS. Additionally, the discussion suggested that magnetic phase separation and weak ferromagnetism may be common mechanisms underlying the magnetization reversal phenomenon in other RVO3 systems.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Yuqing Li, Dan Wu, Mingkun Wang, Zhanjia Wang, Weiqiang Liu, Yuan Teng, Ming Yue, Hongguo Zhang, Weixing Xia
Summary: This paper presents an in-situ observation of the magnetic domain structure and its dynamic evolution of core-shell structure grains in the grain-boundary diffused Nd-Fe-B magnet. It is found that the shell regions have wider domains due to higher anisotropy constant and lower saturation magnetization. The study reveals that the demagnetization process of core-shell structure exhibits a multi-step nucleation process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Pharmacology & Pharmacy
Divya S. Parimi, Yamini Gupta, Sreekar Marpu, Chandra S. Bhatt, Tharun K. Bollu, Anil K. Suresh
Summary: Cancer therapy has seen advancements with the use of nanovectors, particularly superparamagnetic iron oxide nanoparticles (SPION). SPIONs possess high reactivity, superior contrast, and magnetic and photo-inducibility properties, making them significant in cancer treatment. This article summarizes the progress of nanomagnets in cancer therapy, focusing on sustainable biomimetic approaches.
JOURNAL OF PHARMACEUTICAL ANALYSIS
(2022)
Article
Nanoscience & Nanotechnology
Dong Li, Baoshan Cui, Xiaobin Guo, Zhengyu Xiao, Wei Zhang, Xiaoxiong Jia, Jinyu Duan, Xu Liu, Jie Chen, Zhiyong Quan, Guoqiang Yu, Xiaohong Xu
Summary: A current-induced four-state magnetization reversal under zero magnetic field has been achieved in a wedged Ta/MgO/CoFeB/MgO heterostructure with perpendicular magnetic anisotropy. The field-free multi-level reversal is determined by the spin-orbit torque effective field and the current-induced Oersted field, while the formation of intermediate Hall resistance states in multi-state switching depends strongly on current-induced Joule heating. These results provide a pathway for field-free multi-level state reversal, which is significant for developing non-volatile and energy-efficient multi-level memories or artificial neuron devices.
Article
Physics, Multidisciplinary
Mohamad Niknam, Md. Fahim F. Chowdhury, Md Mahadi Rajib, Walid Al Misba, Robert N. Schwartz, Kang L. Wang, Jayasimha Atulasimha, Louis-S. Bouchard
Summary: This paper introduces a technique for addressing spin qubits using voltage control of nanoscale magnetism. The authors demonstrate that by tuning the frequency and phase, high-fidelity single-qubit quantum gate operations can be achieved with low energy consumption and lossless magnetic field control.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Chunli Huang, Nemin Wei, Allan H. MacDonald
Summary: This study explores the quantized anomalous Hall effect in graphene multilayers with flat moire minibands, and suggests a current-driven mechanism for reversing the sign of the Hall effect in these Chern insulators.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
E. Burzuri, M. J. Martinez-Perez, M. Munto, L. A. Barrios, N. Ventosa, O. Roubeau, J. Veciana, G. Aromi, F. Luis
Summary: This study investigates how crystal size affects the magnetic ordering in arrays of molecular nanomagnets. The results show that the ordered phase remains ferromagnetic, but the critical temperature decreases with crystal size. In addition, the onset of magnetic order leads to long spin thermalization time scales.
Article
Materials Science, Multidisciplinary
G. Sala, J. Meyer, A. Flechsig, L. Gabriel, P. Gambardella
Summary: We studied the incubation and transition times of magnetization switching in nanomagnets with perpendicular anisotropy induced by spinorbit torques. A phenomenological model was proposed to interpret the dependence of incubation time on voltage pulse amplitude and assisting magnetic field, and the volume of the seed domain triggering the switching was estimated. Our measurements revealed a correlation between incubation and transition times mediated by temperature variation during the electric pulse. Stochastic distributions of the two times were discussed in terms of energy barriers opposing the nucleation and expansion of the seed domain, and two models based on the log-normal and gamma functions were proposed to account for the different origins of incubation and transition time variability.
Article
Materials Science, Ceramics
H. Spiridigliozzi, A. Pille, F. Schoenstein, L. Museur, E. Feldbach, H. Mandar, M. Kitaura, A. Kanaev
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Multidisciplinary
Mohamed Ali Bousnina, Frederic Schoenstein, Silvana Mercone, Noureddine Jouini
Article
Chemistry, Multidisciplinary
Mohamed Ali Bousnina, Amel Dakhlaoui-Omrani, Frederic Schoenstein, Yaghoub Soumare, Aliou Hamady Barry, Jean-Yves Piquemal, Guillaume Viau, Silvana Mercone, Noureddine Jouini
Article
Chemistry, Physical
Anh Ngoc Nguyen, Jeanne Solard, Huyen Thi Thanh Nong, Chirine Ben Osman, Andres Gomez, Valerie Bockelee, Sylvie Tence-Girault, Frederic Schoenstein, Maite Simon-Sorbed, Anna Esther Carrillo, Silvana Mercone
Article
Thermodynamics
F. Delorme, C. Chen, F. Schoenstein, N. Jaber, F. Jean, M. Bah, Q. Simon, T. Chartier, P. Laffez, I Monot-Laffez, F. Giovannelli
Summary: The study investigates the origin of low thermal conductivity in niobium-containing perovskites, finding it to be related to cation deficiency on the A-site. This results in NaNbO3 and KNbO3 ceramics exhibiting stable thermal conductivity values, with KNbO3 even showing the lowest thermal conductivity reported for an oxide with a perovskite structure.
THERMOCHIMICA ACTA
(2021)
Article
Engineering, Mechanical
Tatiana Mishurova, Katia Artzt, Birgit Rehmer, Jan Haubrich, Luis Avila, Frederic Schoenstein, Itziar Serrano-Munoz, Guillermo Requena, Giovanni Bruno
Summary: In the absence of tensile residual stress, fatigue life at elevated temperature is primarily controlled by defects; densification has a much stronger effect than considered heat treatments on the improvement of mechanical performance.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Biomedical
A. Gharbi, S. Ayadi, N. Jouini, F. Schoenstein, H. Oudadess, H. El Feki, W. Cheikhrouhou-Koubaa
Summary: This study successfully consolidated alkali borated bioactive glasses powders at low temperature using Spark Plasma Sintering (SPS), achieving high density and fully amorphous structure. Increasing the sintering temperature resulted in crystallization and higher density, making it suitable for repairing defects in non-load bearing bones and improving bone/implant bioactivity. The mechanical properties of the glasses decreased with increasing boron content, approaching those of natural materials.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Huyen T. T. Nong, Anh N. Nguyen, Jeanne Solard, Andres Gomez, Silvana Mercone
Summary: This study aimed to investigate the influence of a hybrid interface in polyvinylidene fluoride (PVDF)-based composite thin films on the local piezoelectric response. Surprisingly, the optimization of beta-phase content using nano-inclusions did not correspond to the expected nanoscale piezoelectric optimization. The dispersion of metallic ferromagnetic nano-inclusions inside the PVDF films allowed for partial recovery of the local piezoelectric properties, despite initial observations of large piezoelectric losses at the nanoscale level.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Hugo Spiridigliozzi, Silvana Mercone, Guillaume Lang, Eduard Feldbach, Andrei Kanaev, Frederic Schoenstein
Summary: This study investigated the evolution of structural defects in fine-grain transparent MgAl2O4 ceramics after consolidation via Spark Plasma Sintering and heat treatment under air. The results showed that a dark discoloration caused by carbon contamination and partial reduction during the sintering process could be suppressed by post-annealing under air. EPR and cathodoluminescence analyses demonstrated the significance of the reduction of Mn4+ ions after the consolidation of powders.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Physics, Multidisciplinary
R. Mahayri, S. Mercone, F. Giovannelli, K-L Tan, J-M Morelle, N. Jouini, F. Schoenstein
Summary: In this study, the transport properties of sintered intermetallic Ag3Sn powders were analyzed using spark plasma sintering (SPS) at room temperature. The results showed that the sintering temperature was the key factor affecting the microstructure of the sintered material. Additionally, the density and grain size of the sintered samples played a significant role in determining the thermal conductivity and electrical resistivity.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Editorial Material
Physics, Multidisciplinary
N. Jouini, F. Schoenstein, S. Mercone
Summary: This special issue presents scientific results on the relationship between functionality and structure in micro- and nano-structured materials. It brings together expertise from physics, mechanics, and chemistry for a trans-disciplinary discussion on the multi-scaled properties of nanostructured systems. The focus is on understanding the parameters governing the macroscopic physical properties of these structures and developing reliable strategies for characterizing the microstructures and linking them to the performance of nanostructured materials. This is essential for improving the physical functionalities of new nanostructures.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Engineering, Chemical
Hugo Spiridigliozzi, Olivier Rouleau, Andrei Kanaev, Freïdeïric Schoenstein
Summary: We describe a controlled synthesis method of MAl2O4 (M = Mg, Co, Ni, Zn, Ba) nanopowders. The method involves three main steps: growth of ultraporous nanofibrous Al2O3 (UPA) monoliths, M-nitrate impregnation, and heat treatment. The formation of desirable nanocrystallites, such as spinel structures below 10 nm, was achieved. This synthesis route has potential applications in the fabrication of functional materials for various fields.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Mohsen Mhadhbi, Ilker Emin Dag, Baris Avar, Mohamed Khitouni, Mohamed Ali Bousnina, Frederic Schoenstein, Noureddine Jouini
Summary: Dense nanostructured carbides in ternary system Ti-Cr-C were prepared using a two-steps method. First, nanostructured Ti0.9Cr0.1C carbides were prepared by high-energy planetary ball milling, and then densified carbides were produced using spark plasma sintering. The effect of sintering on microstructural and electrochemical properties of the carbides was investigated. The results showed the decomposition of (Ti,Cr)C carbide into TiC, Cr7C3, and Cr3C2 phases during sintering, and the 20 h milled carbide showed the highest corrosion resistance.
Article
Materials Science, Multidisciplinary
Giulia Franceschin, Thomas Gaudisson, Sonia Perez Quiros, Nader Yaacoub, Jean-Marc Greneche, Nicolas Menguy, Silvana Mercone, Frederic Mazaleyrat, Souad Ammar
JOURNAL OF MATERIALS CHEMISTRY C
(2020)