摘要:
A switching element, a transformer having a primary winding connected through said switching element to a DC power supply and a resonance capacitor connected in parallel with the primary winding of said transformer constitute a single-ended switching circuit. A magnetic amplifier is connected between the secondary side circuit of the transformer of the single-ended switching circuit and a rectifying/smoothing circuit, thus forming a high frequency switching circuit.
摘要:
A high frequency switching circuit comprised of a single-ended switching circuit, rectifying-smoothing circuit and magnetic amplifier which is connected between said single-ended switching circuit and rectifying-smoothing circuit. The magnetic amplifier includes a saturable reactor which has a coercive force Hc of 0.6 Oe or above and a rectangular ratio Br/Bs of 80% or below at an operating frequency of 20 kHz. The saturable reactor is prepared from an amorphous magnetic alloy having a composition of (Co.sub.1-a-b-c Fe.sub.a Ni.sub.b M.sub.c).sub.1-d X.sub.d where: M=one element selected from a group consisting of the elements of Nb, Cr, Mo, V, Ta, Ti, Zr and W X=B or a compound of B and Si in which the content of Si is set at 25 atomic % or less 0.04.ltoreq.a.ltoreq.0.15 0.ltoreq.b.ltoreq.0.10 0.005.ltoreq.c.ltoreq.0.10 0.15.ltoreq.d.ltoreq.0.30.
摘要:
An amorphous alloy of high magnetic permeability, having a general formula;(T.sub.y Nb.sub.x A.sub.1-x-y).sub.100-z X.sub.zwhere,"A" is at least one kind selected from the group consisting of 0.5 to 10 atomic % of V, Ta, Ti, Zr, Cr, Mo, W and 0.5 to 30 atomic % of Ni based on the total amount of T, Nb and A,"T" is at least one element selected from the group of Fe and Co,"X" is B or B+Si, the amount of Si being at most 25 atomic % based on the total amount of the alloy,"x" ranges between 0.005 and 0.1,"y" ranges between 0.5 and 0.99, and"z" ranges between 15 and 35, with the proviso of 0.005.ltoreq.1-x-y.ltoreq.0.4.
摘要:
There is disclosed a low-loss amorphous alloy represented by the following formula:(Fe.sub.1-a-b Nb.sub.a M.sub.b).sub.100-c X.sub.cwherein M is at least one metallic element selected from the group consisting of V, Cr, Mo, Ta and W; X is B or a combination of B and Si (the amount of the Si is 10 or less atomic percent of its formula weight); and a, b and c satisfy the relation of 0.01.ltoreq.a.ltoreq.0.075, 0.ltoreq.b.ltoreq.0.05, 0.02.ltoreq.a+b.ltoreq.0.075, and 12.ltoreq.c.ltoreq.21, respectively.The amorphous alloys of the present invention exhibit larger saturation magnetic flux densities and less iron losses than the conventional ferrite at a high frequency region.
摘要:
There is disclosed an amorphous alloy for a magnetic core material represented by the formula(Co.sub.1-x.sbsb.1.sub.-x.sbsb.2 Fe.sub.x.sbsb.1 M.sub.x.sbsb.2).sub.x.sbsb.3 B.sub.x.sbsb.4 Si.sub.100-x.sbsb.3.sub.-x.sbsb.4wherein M is at least one element selected from the group consisting of Ti, V, Cr, Mn, Ni, Zr, Nb, Mo, Ru, Hf, Ta, W and Re, and x.sub.1, x.sub.2, x.sub.3 and x.sub.4 are numbers which satisfy relations of 0.ltoreq.x.sub.1 .ltoreq.0.10, 0.ltoreq.x.sub.2 .ltoreq.0.10, 70.ltoreq.x.sub.3 .ltoreq.79 and 5.ltoreq.x.sub.4 .ltoreq.9, respectively.According to the present invention, it could be provided an amorphous alloy suitable for a magnetic core material of a magnetic amplifier in which its coercive force is as low as 0.4 oersted or less at a high frequency of 20 KHz or more, particularly even at 50 KHz, and its rectangular ratio is as much as 85% or more.
摘要:
A rolled core is formed by winding a thin body of an amorphous magnetic alloy having positive magnetostriction characteristics so that, of the two surfaces the surface of smaller surface coarseness faces inward. This rolled core is improved in iron loss over a rolled core obtained by winding the thin body so that the surface of greater surface coarseness faces inward. Breakage of the thin body tends to occur less frequently when it is wound so that the surface faces inward.
摘要:
An amorphous magnetic alloy has a general formula:(Fe.sub.1-a.Ni.sub.a).sub.100-x-y.Si.sub.x.B.sub.ywhere0.2.ltoreq.a.ltoreq.0.71.ltoreq.x.ltoreq.205.ltoreq.y.ltoreq.9.515.ltoreq.x+y.ltoreq.29.5The alloy is low in iron loss and suitable for forming a magnetic core used under a high frequency.
摘要翻译:无定形磁性合金具有以下通式:(Fe1-a.Nia)100-SiX.Six.By,其中0.2≤i≤0.71 = x = 9.5 15 = x + y = 29.5合金铁损低,适合于形成高频下使用的磁芯。
摘要:
Disclosed is a ferromagnetic tunnel junction structure which is characterized by having a tunnel barrier layer that comprises a non-magnetic material having a spinel structure. The ferromagnetic tunnel junction structure is also characterized in that the non-magnetic material is substantially MgAl2O4. The ferromagnetic tunnel junction is also characterized in that at least one of the ferromagnetic layers comprises a Co-based full Heusler alloy having an L21 or B2 structure. The ferromagnetic tunnel junction structure is also characterized in that the Co-based full Heusler alloy comprises a substance represented by the following formula: Co2FeAlxSi1-x (0≦x≦1). Also disclosed are a magnetoresistive element and a spintronics device, each of which utilizes the ferromagnetic tunnel junction structure and can achieve a high TMR value, that cannot be achieved by employing conventional tunnel barrier layers other than a MgO barrier.
摘要翻译:公开了一种铁磁隧道结结构,其特征在于具有隧道势垒层,其包括具有尖晶石结构的非磁性材料。 铁磁隧道结结构的特征还在于非磁性材料基本上是MgAl 2 O 4。 铁磁隧道结的特征还在于至少一个铁磁层包括具有L21或B2结构的Co基全Heusler合金。 铁磁隧道结结构的特征还在于,基于Co的全Heusler合金包含由下式表示的物质:Co2FeAlxSi1-x(0≦̸ x≦̸ 1)。 还公开了一种磁阻元件和自旋电子学器件,其中每一个都利用铁磁隧道结结构并且可以实现高TMR值,这不能通过使用除MgO阻挡层之外的常规隧道势垒层来实现。
摘要:
Magnetic thin film having high spin polarizability and a magnetoresistance effect device and a magnetic device using the same, provided with a substrate (2) and Co2MGa1-xAlx thin film (3) formed on the substrate (2), the Co2MGa1-xAlx thin film (3) has a L21 or B2 single phase structure, M of the thin film is either one or two or more of Ti, V, Mo, W, Cr, Mn, and Fe, an average valence electron concentration Z in M is 5.5≦Z≦7.5, and 0≦x≦0.7, shows ferromagnetism at room temperature, and can attain high spin polarizability. A buffer layer (4) may be inserted between the substrate (2) and the Co2FexCr1-xAl thin film (3). The tunnel magnetoresistance effect device and the giant magnetoresistance effect device using this magnetic thin film can attain large TMR and GMR at room temperature under the low magnetic field.
摘要翻译:具有高自旋极化性的磁性薄膜和磁阻效应器件及使用该磁性器件的磁性器件,在基片(2)上形成有衬底(2)和Co2MGa1-xAlx薄膜(3),Co2MGa1-xAlx薄膜 (3)具有L21或B2单相结构,M的薄膜为Ti,V,Mo,W,Cr,Mn和Fe中的一种或两种以上,M中的平均价电子浓度Z为5.5 <= Z <= 7.5,0 <= x <= 0.7,在室温下显示出铁磁性,并且可以获得高的自旋极化性。 可以在衬底(2)和Co2FexCr1-xAl薄膜(3)之间插入缓冲层(4)。 使用这种磁性薄膜的隧道磁阻效应器件和巨磁阻效应器件可以在低磁场下在室温下获得大的TMR和GMR。
摘要:
A method for producing a magnetic particle forming a magnetic material for absorbing electromagnetic waves comprises the steps of mixing an organometallic complex or a metal salt with a chain polymer and dissolving the mixture in a solvent (step S1); raising the temperature of the mixture to reaction temperature (step S2), carrying out a reaction at the reaction temperature (step S3); and forming the magnetic particle having a structure that the periphery of each fine particle formed from the organometallic complex or the metal salt is surrounded by the chain polymer and recovering the formed magnetic particle after the reaction (step S4). The magnetic particle has a nanogranular structure to become a magnetic material for absorbing electromagnetic waves. Such a magnetic particle is produced by a wet reaction. Thus, a larger amount of magnetic particle can be produced by one reaction.