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公开(公告)号：US09336797B2
公开(公告)日：2016-05-10
申请号：US14290768
申请日：2014-05-29
发明人： Masukazu Igarashi , Masato Matsubara , Keiichi Nagasaka , Yo Sato , Masato Shiimoto , Masashige Sato
CPC分类号： G11B5/00 , G11B5/1278 , G11B5/23 , G11B5/235 , G11B5/3146 , G11B2005/0024
摘要： The present disclosure generally relates to a high-frequency oscillator for use in a recording device having a microwave-assisted magnetic recording head. The microwave-assisted magnetic recording head achieves a large assist effect by using an extended spin torque oscillator disposed between a main magnetic pole and a pole opposite the main magnetic pole. The spin torque oscillator obtains a strong high-frequency magnetic field and comprises a first non-magnetic spin scatterer, a reference layer, a first non-magnetic spin transfer layer, a first magnetic field generating layer, a second non-magnetic spin transfer layer, a second magnetic field generating layer, and a second non-magnetic spin scatterer. The spin torque oscillator has a drive current flowing though in the direction from the first magnetic field generating layer to the reference layer.
摘要翻译： 本公开总体上涉及用于具有微波辅助磁记录头的记录装置中的高频振荡器。 微波辅助磁记录头通过使用设置在主磁极和与主磁极相对的极之间的扩展旋转扭矩振荡器来实现大的辅助效果。 旋转扭矩振荡器获得强的高频磁场，并且包括第一非磁性旋转散射体，参考层，第一非磁性自旋转移层，第一磁场产生层，第二非磁性自旋转移层 ，第二磁场产生层和第二非磁性旋转散射体。 自旋转矩振荡器具有沿着从第一磁场产生层到参考层的方向流动的驱动电流。
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公开(公告)号：US09311934B1
公开(公告)日：2016-04-12
申请号：US14808693
申请日：2015-07-24
IPC分类号： G11B5/147
CPC分类号： G11B5/147 , G11B5/23 , G11B5/3146 , G11B2005/0024
摘要： Embodiments disclosed herein generally relate to a MAMR head. The MAMR head includes an STO and a current switching system electrically coupled to the STO. The current switching system can be used to optimize the STO frequency by changing the STO bias polarity, i.e., by changing the direction of the current flowing to the STO. As a result, the difference between the STO frequency and the magnetic media frequency is minimized, which improves recording capability of the MAMR head.
摘要翻译： 本文公开的实施例通常涉及MAMR头。 MAMR头包括电连接到STO的STO和电流开关系统。 当前的开关系统可用于通过改变STO偏置极性，即通过改变流向STO的电流的方向来优化STO频率。 结果，STO频率和磁性介质频率之间的差异被最小化，这提高了MAMR磁头的记录能力。
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3.发明授权Magnetic head having a spin torque oscillator (STO) with a hybrid heusler field generation layer (FGL) 有权具有具有混合heusler场产生层（FGL）的自旋扭矩振荡器（STO）的磁头，公开(公告)号：US09230597B2
公开(公告)日：2016-01-05
申请号：US14070401
申请日：2013-11-01
发明人： Masato Shimoto , Keiichi Nagasaka , Masato Matsubara , Yo Sato
CPC分类号： G11B23/0057 , G11B5/1278 , G11B5/314 , G11B5/3146 , G11B2005/0024 , Y10T29/49055
摘要： In one embodiment, a magnetic head includes a main pole configured to write data to a magnetic medium, a trailing shield positioned on a trailing side of the main pole, and a STO between the main pole and the trailing shield, wherein the STO includes a laminated structure having a FGL, a spun polarization layer (SPL), and a non-magnetic spacer positioned between the FGL and the SPL, wherein the FGL includes a laminated structure having one or more layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer. In another embodiment, a method is presented for forming such a magnetic head utilizing a FGL that includes a laminated structure baying layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer.
摘要翻译： 在一个实施例中，磁头包括被配置为将数据写入磁介质的主极，位于主极的后侧的后屏蔽和主极与后屏蔽之间的STO，其中STO包括 具有FGL的层压结构，旋转偏振层（SPL）和位于FGL和SPL之间的非磁性间隔件，其中FGL包括具有一层或多层CoFe合金和Heusler合金交替层压的层压结构 按照从最接近非磁性间隔物的FGL的一端的顺序。 在另一个实施例中，提出了一种使用FGL形成这种磁头的方法，所述FGL包括从最接近非磁性间隔物的FGL的端部依次层叠的CoFe合金和Heusler合金的叠层结构的层叠结构 。
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4.发明申请MAGNETIC HEAD HAVING A SPIN TORQUE OSCILLATOR (STO) WITH A HYBRID HEUSLER FIELD GENERATION LAYER (FGL) 有权具有混合高频场发生层（FGL）的旋转扭矩振荡器（STO）的磁头公开(公告)号：US20150124347A1
公开(公告)日：2015-05-07
申请号：US14070401
申请日：2013-11-01
发明人： Masato Shimoto , Keiichi Nagasaka , Masato Matsubara , Yo Sato
CPC分类号： G11B23/0057 , G11B5/1278 , G11B5/314 , G11B5/3146 , G11B2005/0024 , Y10T29/49055
摘要： In one embodiment, a magnetic head includes a main pole configured to write data to a magnetic medium, a trailing shield positioned on a trailing side of the main pole, and a STO between the main pole and the trailing shield, wherein the STO includes a laminated structure having a FGL, a spun polarization layer (SPL), and a non-magnetic spacer positioned between the FGL and the SPL, wherein the FGL includes a laminated structure having one or more layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer. In another embodiment, a method is presented for forming such a magnetic head utilizing a FGL that includes a laminated structure baying layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer.
摘要翻译： 在一个实施例中，磁头包括被配置为向磁介质写入数据的主极，位于主极的后侧的后屏蔽和主极与后屏蔽之间的STO，其中STO包括 具有FGL的层压结构，旋转偏振层（SPL）和位于FGL和SPL之间的非磁性间隔件，其中FGL包括具有一层或多层CoFe合金和Heusler合金交替层压的层压结构 按照从最接近非磁性间隔物的FGL的一端的顺序。 在另一个实施例中，提出了一种使用FGL形成这种磁头的方法，所述FGL包括从最接近非磁性间隔物的FGL的端部依次交替层叠的CoFe合金和Heusler合金的叠层结构的层叠结构 。
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公开(公告)号：US20140085753A1
公开(公告)日：2014-03-27
申请号：US13629401
申请日：2012-09-27
发明人： Keiichi Nagasaka , Masato Shiimoto , Masato Matsubara , Yuta Udou
CPC分类号： G11B5/314 , G11B2005/0024
摘要： A microwave assisted magnetic recording write head having a spin torque oscillator capable of producing high strength high frequency magnetic oscillations with reduced applied current. The spin torque oscillator uses a magnetic field generation layer with a high moment material including such as Fe and Co that is formed on an interlayer having a face centered cubic (fcc) crystal structure, that functions as an under-layer. The high moment magnetic field generation layer has also reduced magnetic damping.
摘要翻译： 具有能够以降低的施加电流产生高强度高频磁振荡的自旋扭矩振荡器的微波辅助磁记录写头。 自旋扭矩振荡器使用具有高力矩材料的磁场产生层，其包括诸如Fe和Co，其形成在具有面心立方（fcc）晶体结构的层间，其用作底层。 高力矩磁场产生层也减小了磁阻。
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公开(公告)号：US09202528B2
公开(公告)日：2015-12-01
申请号：US14040151
申请日：2013-09-27
发明人： Masaru Furukawa , Jianhua Li , Masato Matsubara , Masato Shiimoto
CPC分类号： G11B33/1433 , G11B5/314 , G11B2005/0024
摘要： Embodiments of the present invention generally relate to a microwave assisted magnetic recording (MAMR) head. The MAMR head includes a main pole, a trailing shield, and a spin torque oscillator (STO) disposed between the main pole and the trailing shield. The STO is recessed from an air bearing surface.
摘要翻译： 本发明的实施例一般涉及微波辅助磁记录（MAMR）头。 MAMR头包括主极，后屏蔽和设置在主极和后屏蔽之间的自旋扭矩振荡器（STO）。 STO从空气轴承表面凹陷。
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7.发明授权Microwave-assisted magnetic recording (MAMR) head employing advanced current control to establish a magnetic resonance state 有权微波辅助磁记录（MAMR）头使用高级电流控制建立磁共振状态公开(公告)号：US09007723B1
公开(公告)日：2015-04-14
申请号：US14106390
申请日：2013-12-13
发明人： Masukazu Igarashi , Masato Shiimoto , Masato Matsubara , Yo Sato , Kenji Sugiura
CPC分类号： G11B5/314 , G11B2005/0024
摘要： In one embodiment, a microwave-assisted magnetic recording (MAMR) head includes a main pole configured to write data to a magnetic medium using a write magnetic field, a write coil, wherein the write magnetic field is produced by the main pole upon a recording current, Iw, being provided to the write coil, and a spin torque oscillator (STO) positioned near the main pole, the STO being configured to provide a high-frequency assistance magnetic field to the magnetic medium upon a STO drive current, ISTO, being provided to the STO, wherein the STO drive current, ISTO, is ramped-up prior to the recording current, Iw, being provided to the write coil in order to begin a write operation for writing data to the magnetic medium. A method of operation for the MAMR head and an apparatus including the MAMR head are also described according to additional embodiments.
摘要翻译： 在一个实施例中，微波辅助磁记录（MAMR）头包括被配置为使用写入磁场将数据写入磁介质的主极，写入线圈，其中写入磁场由记录时的主极产生 电流Iw被提供给写入线圈，以及位于主极附近的自旋扭矩振荡器（STO），STO被配置为在STO驱动电流ISTO时向磁介质提供高频辅助磁场， 提供给STO，其中STO驱动电流ISTO在记录电流Iw提供给写入线圈之前被斜坡上升，以便开始写入数据到磁介质的写入操作。 还根据另外的实施例描述了用于MAMR头的操作方法和包括MAMR头的装置。
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公开(公告)号：US08970996B2
公开(公告)日：2015-03-03
申请号：US13629401
申请日：2012-09-27
发明人： Keiichi Nagasaka , Masato Shiimoto , Masato Matsubara , Yuta Udou
IPC分类号： G11B5/127
CPC分类号： G11B5/314 , G11B2005/0024
摘要： A microwave assisted magnetic recording write head having a spin torque oscillator capable of producing high strength high frequency magnetic oscillations with reduced applied current. The spin torque oscillator uses a magnetic field generation layer with a high moment material including such as Fe and Co that is formed on an interlayer having a face centered cubic (fcc) crystal structure, that functions as an under-layer. The high moment magnetic field generation layer has also reduced magnetic damping.
摘要翻译： 具有能够以降低的施加电流产生高强度高频磁振荡的自旋扭矩振荡器的微波辅助磁记录写头。 自旋扭矩振荡器使用具有高力矩材料的磁场产生层，其包括诸如Fe和Co，其形成在具有面心立方（fcc）晶体结构的层间，其用作底层。 高力矩磁场产生层也减少了磁阻力。
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