Proceedings of ISAF-ECAPD-PFM 2012最新文献_第3页

Measuring magnetoelectric and magnetopiezoelectric effects 测量磁电和磁压电效应

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297798

J. Evans, S. Chapman, S. Smith, B. Howard, A. Gallegos

{"title":"Measuring magnetoelectric and magnetopiezoelectric effects","authors":"J. Evans, S. Chapman, S. Smith, B. Howard, A. Gallegos","doi":"10.1109/ISAF.2012.6297798","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297798","url":null,"abstract":"The authors have developed a test procedure and circuits for characterizing the charge generation of a magnetoelectric device when stimulated with a magnetic field. The magnetoelectric effect comes in two physical forms. The first is from a ferroic material such as Bismuth Iron Oxide (BFO) which exhibits internal coupling between its magnetic properties and its ferroelectric properties. The second is from composite devices which are constructed by mechanically coupling a magnetic material to a piezoelectric material. A magnetic field applied to a composite device creates stress in the magnetic material which transfers the stress to the piezoelectric material. The traditional method for measuring magnetoelectric effect is to stimulate the sample with a magnetic field while measuring the voltage generated across the sample. These voltages can be so small that a lock-in amplifier is required to pull the signal out of ambient noise. Charge measurement under the same circumstances produces a much larger signal and can be related to the voltage response using the dielectric constant of the material [1]. The charge test is an exact analog to the traditional electrical hysteresis test with the exception that the test instrument applies a magnetic field to the sample instead of an electric field. The presenter will describe the test procedure as presently used and outline future objectives for improving the accuracy and sensitivity of the results.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"80 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85254107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Hyperbolique law of a ferroïc single crystal at low applied constraint amplitudes ferroïc单晶在低施加约束振幅下的双曲定律

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297823

R. Renoud, C. Borderon, M. Ragheb, H. Gundel

{"title":"Hyperbolique law of a ferroïc single crystal at low applied constraint amplitudes","authors":"R. Renoud, C. Borderon, M. Ragheb, H. Gundel","doi":"10.1109/ISAF.2012.6297823","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297823","url":null,"abstract":"The response of a single crystal to the application of low constraint amplitudes (electric field E or mechanic stress σ) is generally depicted by the empirical Rayleigh law. According to the model describing the motion of the domain walls and presented else where in this congress, we establish, in the limit of the Rayleigh domain, the variation of the dielectric constant ε and of the piezoelectric coefficient d with the amplitude of the applied constraint. For low amplitudes, we have to consider two different mechanisms: the vibration of the wall in a pinning centre and its jumps between sites. For the vibration mechanism, we show that ε and d are nondependent of the amplitude of E or σ, while these quantities vary linearly with the amplitude for the jump processes. So, the jumps contribution becomes important only if the amplitude is higher than a threshold value. This one is a function of the frequency and of the temperature. This results in a hyperbolic law which is a generalization of the Rayleigh law. A parallel between the electrical and mechanical responses ε and d is done and the corresponding hyperbolic laws are plotted with normalized variables. In this representation, the curves ε(E) and d(E) are identical because each response is due to the same mechanism, the motion of the domain walls. The link between the two quantities is the electrostrictive coefficient. Data from the literature confirms this theoretical result. Finally, studies at higher amplitudes shows that the response deviates from the hyperbolic law. The value of the amplitude for which a deviation from the hyperbolic law is significant strongly depends on the difference between the frequency used and the frequency of the relaxation of domain walls. This is in agreement with data of the literature.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85371278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combinatory piezoelectric and inductive vibration energy harvesters 组合压电和感应振动能量采集器

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297868

A. Marin, Yongke Yan, S. Priya

引用次数: 3

Study on reinforcement and repair of cracked piezoelectric materials 裂纹压电材料的加固与修复研究

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297751

S. Hong, M. S. Woo, D. Song, C. Yang, K. H. Baek, T. Sung

引用次数: 2

Equivalent magnetic noise in magnetoelectric laminate composites: A review 磁电层压复合材料的等效磁噪声研究进展

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297755

Yaojin Wang, Jiefang Li, D. Viehland

引用次数: 1

Feasibility study on application of piezoelectricity to convert vibrations of Korea Train eXpress 利用压电转换韩国高速列车振动的可行性研究

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297738

D. Song, C. Yang, S. Hong, Se Bin Kim, M. S. Woo, T. Sung

引用次数: 9

Dielectric properties and relaxor behavior of Ba0.67Sr0.33TiO3-CaBi4Ti4O15 ceramics Ba0.67Sr0.33TiO3-CaBi4Ti4O15陶瓷的介电性能和弛豫行为

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297805

Jing Xu, Hangxing Liu, Bo He, H. Hao, M. Cao

引用次数: 0

New opportunity in alkali niobate ceramics processed in low oxygen partial pressure 低氧分压条件下碱铌酸盐陶瓷加工的新机遇

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297768

K. Kobayashi, C. A. Randall, M. Ryu, Y. Doshida, Y. Mizuno

{"title":"New opportunity in alkali niobate ceramics processed in low oxygen partial pressure","authors":"K. Kobayashi, C. A. Randall, M. Ryu, Y. Doshida, Y. Mizuno","doi":"10.1109/ISAF.2012.6297768","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297768","url":null,"abstract":"Alkali niobate ceramics, such as (Na0.5K0.5)NbO3, has been considered as a promising candidate for lead free piezoelectrics and been a subject of growing interest. We focused on the effects of low oxygen partial pressure (pO2) firing of alkali niobate ceramics, and found that piezoelectric and dielectric properties are essentially independent of the firing atmosphere. Furthermore, low pO2 firing provides better electrical resistivity and microstructure than air firing, which can be explained by the fact that alkali volatilization is suppressed in low pO2 firing condition. This opens new opportunities for base meal cofired multilayer applications in the alkali niobate perovskite system. We also found that low pO2 fired NaNbO3-NaTaO3 solid state ceramic exhibited a much higher resistivity than conventional ferroelectric ceramics such as BaTiO3, and also showed relatively high permittivity at high temperatures up to 250 °C, which make this ceramic promising as a capacitor material for the expanding high temperature.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"30 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86893619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Modeling of the properties of a ferroïc single crystal based on the motion of domain walls 基于畴壁运动的ferroïc单晶性质建模

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297822

M. Ragheb, R. Renoud, C. Borderon, H. Gundel

{"title":"Modeling of the properties of a ferroïc single crystal based on the motion of domain walls","authors":"M. Ragheb, R. Renoud, C. Borderon, H. Gundel","doi":"10.1109/ISAF.2012.6297822","DOIUrl":"https://doi.org/10.1109/ISAF.2012.6297822","url":null,"abstract":"The ferroïc materials exhibit a nonlinear behavior largely due to the motion of domain walls. To well understand the resulting properties, it is necessary to develop a model describing these movements. In this work, we establish the motion equation of one domain wall induced by application of an electric field E or of a mechanical stress σ. The effects of a magnetic field could also be envisaged. The domain wall is viewed as an equivalent rigid plane in interaction with the crystalline imperfections, these latter being represented in terms of viscous damping force and of restoring force. The model can be applied to single crystals at low constraint amplitudes because the walls density is a constant as well as at high amplitudes if this density remains constant. The polarization P, the strain S, the dielectric constant ε and the piezoelectric coefficient d are obtained from the model. In particular, the frequency dependence of ε and d (real and imaginary parts) is calculated and the corresponding expressions of the relaxation times are obtained. We determine also the variation of ε and d with the amplitude of the ac applied constraint (E or σ) in the limit of low intensities which results in the hyperbolic law (this latter corresponds to the full expression of the Rayleigh law). The temperature dependence is also included. The expressions of various cycles (P, S, ε and d as a function of E or σ) are also achieved. Predictions of the model for single crystals are in well agreement with experimental data presented in literature.","PeriodicalId":20497,"journal":{"name":"Proceedings of ISAF-ECAPD-PFM 2012","volume":"23 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85557405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fundamental study on application of piezoelectric chiral polymer to new soft actuator 压电性手性聚合物在新型软执行器中的应用基础研究

Proceedings of ISAF-ECAPD-PFM 2012 Pub Date : 2012-07-09 DOI: 10.1109/ISAF.2012.6297732

Y. Tajitsu

引用次数: 2