IEEE Magnetics Letters最新文献_第9页

Hybrid MTJ/CNTFET-Based Binary Synapse and Neuron for Process-in-Memory Architecture 基于混合MTJ/CNTFET的二元突触和神经元在存储器结构中的处理

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2023-01-19 DOI: 10.1109/LMAG.2023.3238271

Milad Tanavardi Nasab;Arefe Amirany;Mohammad Hossein Moaiyeri;Kian Jafari

{"title":"Hybrid MTJ/CNTFET-Based Binary Synapse and Neuron for Process-in-Memory Architecture","authors":"Milad Tanavardi Nasab;Arefe Amirany;Mohammad Hossein Moaiyeri;Kian Jafari","doi":"10.1109/LMAG.2023.3238271","DOIUrl":"https://doi.org/10.1109/LMAG.2023.3238271","url":null,"abstract":"This letter develops a reliable, integrated binary synapse and neuron model for hardware implementation of binary neural networks. Thanks to the nonvolatile nature of magnetic tunnel junctions and the unique features of carbon nanotube field-effect transistors, the modeled design does not require external memory to store weights and also consumes low static power. Also, due to the circuit structure, which did not use sequential parts, the developed circuit is immune to soft error. Because, in binary neural networks, weights are limited to two values of −1 and 1, the occurrence of soft errors dramatically reduces the accuracy of the network. Simulation results indicate that the design in this work consumes at least 9% lower power, occupies 34% lower area, and offers a 49% lower power delay area product. Also, Monte Carlo simulations have been performed to study the effect of the process variation on the network. The result of the Monte Carlo simulations shows that the proposed neuron has no logical error in 10 000 simulations. Consequently, the accuracy of the network utilization by the neuron is equal to the software-implemented network and does not decrease even in the presence of process variations.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67763006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact of Array Length on Particle Attraction in Magnetic Drug Targeting: Investigation Using an Exponential Approximation of the Magnetic Field 阵列长度对磁性药物靶向中粒子吸引力的影响：利用磁场的指数近似研究

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2023-01-16 DOI: 10.1109/LMAG.2023.3237384

Angelika S. Thalmayer;Kilian Götz;Samuel Zeising;Georg Fischer

{"title":"Impact of Array Length on Particle Attraction in Magnetic Drug Targeting: Investigation Using an Exponential Approximation of the Magnetic Field","authors":"Angelika S. Thalmayer;Kilian Götz;Samuel Zeising;Georg Fischer","doi":"10.1109/LMAG.2023.3237384","DOIUrl":"https://doi.org/10.1109/LMAG.2023.3237384","url":null,"abstract":"In magnetic drug targeting, special magnetic nanoparticles that carry the anticancer drug are injected into the cardiovascular system in the vicinity of the tumor and are navigated into the tumor using a magnetic field. Many researchers optimize single magnets for this purpose; however, magnetic arrays that are placed parallel to the vessel in order to increase the impact time of the magnetic force on the particles are also discussed. To the best of the authors' knowledge, the improvement by the increased impact time has not been studied in detail so far and, thus, will be addressed in this work. In this context, an artificial exponential magnetic field that approximates the field of a Halbach array and acts as an upper limit consideration is applied to different impact lengths within a predefined magnetic domain. To compare the impact of the field parameters, the total magnetic energetic effort is kept constant as a reference for studying variations of impact length. The results reveal that a longer impact length increases the attraction performance enormously. However, for the same magnetic effort, a longer impact length with a lower magnetic field strength leads to the same attraction of the particles as a shorter one with higher field strengths. Since it is easier to generate lower field strengths, the usage of arrays to realize a longer impact length is preferable.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67762121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Impact of the Annealing on Magnetothermal Properties of Zn0.2Mn0.8Fe2O4 Nanoparticles 退火对Zn0.2Mn0.8Fe2O4纳米颗粒磁热性能影响的研究

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2023-01-02 DOI: 10.1109/LMAG.2022.3233222

Nan N. Liu;Yulia A. Alekhina;Alexander P. Pyatakov;Nikolai S. Perov;Boris B. Kovalev;Gleb B. Sukhorukov;Alexander M. Tishin;Tomomasa Moriwaki;Kenta Nakazawa;Yuko Ichiyanagi

{"title":"Investigation of Impact of the Annealing on Magnetothermal Properties of Zn0.2Mn0.8Fe2O4 Nanoparticles","authors":"Nan N. Liu;Yulia A. Alekhina;Alexander P. Pyatakov;Nikolai S. Perov;Boris B. Kovalev;Gleb B. Sukhorukov;Alexander M. Tishin;Tomomasa Moriwaki;Kenta Nakazawa;Yuko Ichiyanagi","doi":"10.1109/LMAG.2022.3233222","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3233222","url":null,"abstract":"Magnetic and magnetothermal properties of annealed Zn\u00000.2\u0000Mn\u00000.8\u0000Fe\u00002\u0000O\u00004\u0000 nanoparticles with diameter value, ranging from 9 to 35 nm, have been investigated and compared with earlier investigated unannealed Zn\u00000.2\u0000Mn\u00000.8\u0000Fe\u00002\u0000O\u00004\u0000 magnetic nanoparticles (MNPs). A single-phase spinel structure was observed in both types of MNPs. It has been demonstrated that for the large annealed Zn\u00000.2\u0000Mn\u00000.8\u0000Fe\u00002\u0000O\u00004\u0000 nanoparticles (24.7, 31.4, 35.1 nm) the value of specific absorption rate (SAR) is proportional to the amplitude of the magnetic field as ∼\u0000<italic>H\u00004\u0000. However, for earlier investigated unannealed Zn\u00000.2\u0000Mn\u00000.8\u0000Fe\u00002\u0000O\u00004\u0000 MNPs, superquadratic dependence SAR ∼\u0000<italic>H\u00005\u0000 have been found starting from 13 nm. Significant change of dependence of the character of SAR\u0000<italic>(d)\u0000 may be explained by low values of hysteresis area of small annealed MNPs and, thus, dominant role of Néel relaxation in these annealed Zn\u00000.2\u0000Mn\u00000.8\u0000Fe\u00002\u0000O\u00004\u0000 nanoparticles.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"14 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67763010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2023-01-01 DOI: 10.1109/LMAG.2024.3360173