IEEE Translation Journal on Magnetics in Japan最新文献

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Thermal Stabilities of Cu/Co/Cu/NiFe Multilayers Cu/Co/Cu/NiFe多层膜的热稳定性
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565974
S. Araki;D. Miyauchi;K. Noguchi;T. Chou;Y. Honda;O. Shinoura;Y. Narumiya
{"title":"Thermal Stabilities of Cu/Co/Cu/NiFe Multilayers","authors":"S. Araki;D. Miyauchi;K. Noguchi;T. Chou;Y. Honda;O. Shinoura;Y. Narumiya","doi":"10.1109/TJMJ.1994.4565974","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565974","url":null,"abstract":"Cu/Co/Cu/NiFe multilayer films prepared by evaporation deposition in an ultrahigh vacuum were heat-treated in air and in ultrahigh vacuum. Heat treatment in ultra-high vacuum brought about no changes in the MR ratio or MR slope for annealing temperatures less than 400C. The thermal stability in air was limited by gradual oxidation from the surface, and thermal stability up to 250°C was verified. Improved thermal stability was achieved by the use of thicker NiFe layers.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"159-163"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565974","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67872984","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
Characteristics of a DC-DC Converter Using a Thin Film Microtransformer and a Microinductor 使用薄膜微变压器和微电感的DC-DC转换器的特性
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565962
K. Yamaguchi;Y. Naitou;O. Nakajima;H. Matsuki;K. Murakami
{"title":"Characteristics of a DC-DC Converter Using a Thin Film Microtransformer and a Microinductor","authors":"K. Yamaguchi;Y. Naitou;O. Nakajima;H. Matsuki;K. Murakami","doi":"10.1109/TJMJ.1994.4565962","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565962","url":null,"abstract":"A thin-film microtransformer and a microinductor were fabricated, using photolithographic techniques for all processes. The microtransformer and microinductor are the same size, 3.5×3.9×0.06 mm\u0000<sup>3</sup>\u0000, and both have a layered structure with circular spiral windings between the upper and lower CoFeSiB films. The microtransformer and microinductor were mounted on a primary controlled forward converter, and the converter was operated at high frequencies between 6 and 10 MHz with a load resistance of 51 Ω; an output voltage of 1.9 V was obtained for an input voltage of 6 V. This result is important as a first step toward developing a microconverter in which transformers, inductors, capacitors, and rectifier diodes are integrated monolithically.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"84-89"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565962","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873543","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
Magnetic Properties of bcc FeRh1-xMx Systems bcc-FeRh1-xMx体系的磁性能
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565981
S. Yuasa;Y. Otani;H. Miyajima;A. Sakuma
{"title":"Magnetic Properties of bcc FeRh1-xMx Systems","authors":"S. Yuasa;Y. Otani;H. Miyajima;A. Sakuma","doi":"10.1109/TJMJ.1994.4565981","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565981","url":null,"abstract":"The magnetic properties of ordered bcc FeRh\u0000<inf>1-x</inf>\u0000M\u0000<inf>x</inf>\u0000 alloys (M=Fe, Co, Ni, Pd, Ir and Pt) were studied, in terms of correlations among the antiferromagnetic-ferromagnetic transition temperature T\u0000<inf>0</inf>\u0000, Curie temperature, magnetization, and lattice constant. Substitution of the 3d element M for Rh diminishes the transition temperature T\u0000<inf>0</inf>\u0000, since the large magnetic moment of the M atom stabilizes the ferromagnetism. Moreover, a first-order antiferromagnetic-paramagnetic transition was observed in an FeRh\u0000<inf>1-x</inf>\u0000Ir\u0000<inf>x</inf>\u0000 system. The mechanism of such first-order phase transitions can be explained phenomenologically by introducing magneto-volume coupling into a model based on the SCR theory. The ground state properties of FeRh and FeRh\u0000<inf>1-x</inf>\u0000Pd\u0000<inf>x</inf>\u0000 are well explained by first-principle band calculations based on the linearized muffin-tin orbital method.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"202-209"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565981","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873631","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: 14
Acute Animal Experiment Using a Linear Motor-Driven Total Artificial Heart 直线电机驱动全人工心脏的急性动物实验
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI: 10.1109/TJMJ.1994.4565963
H. Yamada;M. Yamaguchi;M. Karita;Y. Matsuura;S. Fukunaga
{"title":"Acute Animal Experiment Using a Linear Motor-Driven Total Artificial Heart","authors":"H. Yamada;M. Yamaguchi;M. Karita;Y. Matsuura;S. Fukunaga","doi":"10.1109/TJMJ.1994.4565963","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565963","url":null,"abstract":"A linear pulse motor developed by the authors was selected as the actuator for a total artificial heart, because it had the highest thrust/volume ratio, at 0.76 N/ml, of the eight kinds of linear motor considered. This paper summarizes the results of an acute animal experiment using a linear pulse motor-driven total artificial heart (linear TAH). The linear TAH consisted of a linear pulse motor, two sac type blood pumps, and four artificial valves. The mass was 1.3 kg and the volume was 540 ml. The volume of the TAH was a little larger than the target size, equal to the volume of an adult human's fist. The linear TAH was attached to a sheep of body weight 42 kg to evaluate its hemodynamic performance. The descending aortic flow rate was 1.5 1/min, equal to 50% of the rate in the control data. The difference between the flow rates of the left and right blood pumps was 12 to 13%, when the left atrium pressure reading indicated normal pressure. The sheep was sacrificed two hours after the operation. The data obtained suggest that the linear TAH can be used as a circulation-supporting device that satisfies clinical circulatory requirements.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 6","pages":"90-97"},"PeriodicalIF":0.0,"publicationDate":"1994-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565963","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67873542","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: 6
Mechanism of the Magneto-Impedance Effect in Negative Magnetostrictive Amorphous Wires 负磁致伸缩非晶线的磁阻抗效应机理
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-09-01 DOI: 10.1109/TJMJ.1994.4565921
L.V. Panina;K. Mohri
{"title":"Mechanism of the Magneto-Impedance Effect in Negative Magnetostrictive Amorphous Wires","authors":"L.V. Panina;K. Mohri","doi":"10.1109/TJMJ.1994.4565921","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565921","url":null,"abstract":"The concept of a magneto-impedance (MI) effect in magnetic amorphous wires is put forward. At certain frequencies, the wire impedance is highly responsive to magnetic properties, owing to the dependency of the skin depth on magnetic permeability. The theoretical analysis of the MI effect is based on the exact expression for the impedance of a magnetic wire in which the dynamic permeability related to domain wall displacements is damped by microscopic eddy currents. The circular domain structure typical of negative magnetostrictive amorphous wires is considered. In this case, the penetration depth depends on the circumferential permeability, which is a sensitive function of the dc longitudinal field. This theoretical approach is found to account satisfactorily for the existing experimental data on the magneto-impedance characteristics of negative magnetostrictive amorphous wires. In the frequency region where the skin depth is comparable to the wire radius, the MI ratio can reach more than 50% in magnetic fields of the order of the anisotropy field.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 5","pages":"34-39"},"PeriodicalIF":0.0,"publicationDate":"1994-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565921","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67892854","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: 13
Magnetic Properties of Fe-Co-Ti Thin Films Fe-Co-Ti薄膜的磁性能
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-09-01 DOI: 10.1109/TJMJ.1994.4565929
F. Sato;T. Miyazaki
{"title":"Magnetic Properties of Fe-Co-Ti Thin Films","authors":"F. Sato;T. Miyazaki","doi":"10.1109/TJMJ.1994.4565929","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565929","url":null,"abstract":"Sputtered (Fe\u0000<sub>100-y</sub>\u0000Co\u0000<sub>Y</sub>\u0000)\u0000<sub>100-X</sub>\u0000Ti\u0000<sub>X</sub>\u0000 (0≤X≤5, 23≤Y≤53) films were studied with emphasis on the dependence of the soft magnetic properties on composition, annealing temperature and film thickness. After annealing at 823K for 3600 s, the permeability of the film system had a maximum of 1650 at (Fe\u0000<sub>69</sub>\u0000Co\u0000<sub>31</sub>\u0000)\u0000<sub>97</sub>\u0000Ti\u0000<sub>3</sub>\u0000. The corresponding saturation magnetic flux density was 2.2 T. When the lattice constant of Fe-Co film expands by about 0.2%, the permeability reaches a maximum; when the film thickness reaches 1357 nm, the permeability decreases to 500. The permeability of an (Fe\u0000<sub>69</sub>\u0000Co\u0000<sub>31</sub>\u0000)\u0000<sub>97</sub>\u0000Ti\u0000<sub>3</sub>\u0000/ZnO multi-layer film annealed at 773K for 3600 s is 1100; this is about twice the permeability of a single-layer film.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 5","pages":"88-93"},"PeriodicalIF":0.0,"publicationDate":"1994-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565929","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67892855","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: 3
Magnetic Properties of Iron Nitride Thin Films Prepared by the Magnetron Discharge Method 磁控放电法制备氮化铁薄膜的磁性能
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-09-01 DOI: 10.1109/TJMJ.1994.4565931
K. Niizuma;Y. Shato;Y. Utsushikawa
{"title":"Magnetic Properties of Iron Nitride Thin Films Prepared by the Magnetron Discharge Method","authors":"K. Niizuma;Y. Shato;Y. Utsushikawa","doi":"10.1109/TJMJ.1994.4565931","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565931","url":null,"abstract":"The saturation magnetization M\u0000<sub>s</sub>\u0000 of polycrystalline iron thin films increased by approximately 10% after films were subjected to ion nitriding treatment for about one hour. In the latter treatment, the magnetron discharge method was used to increase the energy density of the discharge. The rate of increase of M\u0000<sub>s</sub>\u0000 was 21.2% after the iron thin film was nitrided under an N\u0000<sub>2</sub>\u0000 gas pressure of 4.5×10\u0000<sup>-2</sup>\u0000 Torr. X-ray diffraction studies revealed the presence of Fe\u0000<sub>16</sub>\u0000N\u0000<sub>2</sub>\u0000, γ'-Fe\u0000<sub>4</sub>\u0000N, ε-Fe\u0000<sub>3</sub>\u0000N, ζ-Fe\u0000<sub>2</sub>\u0000N, and α-Fe phases in thin films nitrided under various N\u0000<sub>2</sub>\u0000 gas pressures. The saturation magnetization M\u0000<sub>s</sub>\u0000 of Fe\u0000<sub>16</sub>\u0000N\u0000<sub>2</sub>\u0000, calculated using X-ray integrated intensity ratios, was 2210 emu/cc in nitrided thin films under an N\u0000<sub>2</sub>\u0000 gas pressure of 4.5×10\u0000<sup>-2</sup>\u0000 Torr, and the M\u0000<sub>s</sub>\u0000 of Fe\u0000<sub>16</sub>\u0000N\u0000<sub>2</sub>\u0000, calculated using X-ray integrated intensity ratios, was 1710 emu/cc for thin film nitrided under an N\u0000<sub>2</sub>\u0000 gas pressure of 7.5×10\u0000<sup>-2</sup>\u0000 Torr.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 5","pages":"100-105"},"PeriodicalIF":0.0,"publicationDate":"1994-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565931","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67893972","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: 7
Effect of Shape on the Bias Field of an Ni-Fe/Ti/Co-Zr-Mo Trilayer MR Element 形状对Ni-Fe/Ti/Co-Zr-Mo三层MR元件偏压场的影响
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-09-01 DOI: 10.1109/TJMJ.1994.4565926
H. Nagai;S. Tanoue;T. Yamazaki
{"title":"Effect of Shape on the Bias Field of an Ni-Fe/Ti/Co-Zr-Mo Trilayer MR Element","authors":"H. Nagai;S. Tanoue;T. Yamazaki","doi":"10.1109/TJMJ.1994.4565926","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565926","url":null,"abstract":"The effect of shape on the bias field of an Ni-Fe/Ti/Co-Zr-Mo trilayer MR element is discussed in relation to the aim of controlling the bias field of MR heads. In the case of a single-layer Ni-Fe film, the field at half-maximum MR coefficient was found to be proportional to the thickness and the reciprocal of the height. In the case of a trilayer MR element, the saturation bias field was proportional to the Co-Zr-Mo thickness. The bias field was saturated at smaller sense currents, and the saturation bias field increased as the Ti thickness was decreased. The use of a Co-Zr-Mo surface oxidation layer instead of a Ti layer in the trilayer MR element was effective, because it was possible to fabricate the element as a uniform thin film.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 5","pages":"66-71"},"PeriodicalIF":0.0,"publicationDate":"1994-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565926","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67892848","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: 4
Magnetic Properties of Thin Sheets (50 μm) of Nd-(FeCoNiTi)-B Sintered Magnets Nd-(FeCoNiTi)-B烧结磁体薄片(50μm)的磁性能
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-09-01 DOI: 10.1109/TJMJ.1994.4565922
Y. Fukuda;M. Shimotomai
{"title":"Magnetic Properties of Thin Sheets (50 μm) of Nd-(FeCoNiTi)-B Sintered Magnets","authors":"Y. Fukuda;M. Shimotomai","doi":"10.1109/TJMJ.1994.4565922","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565922","url":null,"abstract":"The magnetic properties of Nd-(FeCoNiTi)-B and Nd-Fe-B type sintered magnets in thin sheet form were investigated from the standpoint of the deterioration in coercivity caused by machining. It was found that the thickness of a deteriorated layer of an Nd-(FeCoNiTi)-B type magnet is smaller than that of an Nd-Fe-B type magnet. This phenomenon is explained in terms of the toughness and fine-grained structure of Nd-(FeCoNiTi)-B magnets. It is suggested that Nd-(FeCoNiTi)-B magnets may be used in the form of 50 μm thick sheets.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 5","pages":"40-46"},"PeriodicalIF":0.0,"publicationDate":"1994-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565922","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67892853","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: 1
Synthesis of Al- or Ga-Substituted Bi3Fe5O12 Garnet Films Al或Ga取代Bi3Fe5O12石榴石薄膜的合成
IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-09-01 DOI: 10.1109/TJMJ.1994.4565941
S. Nishida;T. Okuda;H. Ohsato;Y. Kato;T. Suzuki
{"title":"Synthesis of Al- or Ga-Substituted Bi3Fe5O12 Garnet Films","authors":"S. Nishida;T. Okuda;H. Ohsato;Y. Kato;T. Suzuki","doi":"10.1109/TJMJ.1994.4565941","DOIUrl":"https://doi.org/10.1109/TJMJ.1994.4565941","url":null,"abstract":"Using an alternating ion-beam-sputtering technique, Al\u0000<sup>3+</sup>\u0000 and Ga\u0000<sup>3+</sup>\u0000 ions were successfully substituted for Fe\u0000<sup>3+</sup>\u0000 ions in Bi\u0000<inf>3</inf>\u0000Fe\u0000<inf>5</inf>\u0000O\u0000<inf>12</inf>\u0000 (BIG) film. The effects of substitution were confirmed by measurements of the lattice constant, ferromagnetic resonance field and magnetic moment. The lattice constant and saturation magnetization of BIG film can be adjusted by Al or Ga substitution, which is analogous to Al- or Ga-substituted YIG. The magnetic anisotropy of a BIG film can be changed from the easy-plane type to the perpendicular uniaxial type by Al or Ga substitution. The uniaxial anisotropy is mainly attributed to the stress-induced anisotropy.","PeriodicalId":100647,"journal":{"name":"IEEE Translation Journal on Magnetics in Japan","volume":"9 5","pages":"163-168"},"PeriodicalIF":0.0,"publicationDate":"1994-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TJMJ.1994.4565941","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67892838","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
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