Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin–orbit coupling(SO...Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin–orbit coupling(SOC)has limited its efficiency for generating the spin currents in order to control the magnetization switching process for applications in spintronics memories.Following the theoretical prediction on the enhancement of SOC in Gr by heavy atoms adsorption,here we experimentally observe a sizeable spin–orbit torques(SOTs)in Gr by the decoration of its surface with Pt adatoms in Gr/Pt(t Pt)/Fe Ni trilayers with the optimal damping-like SOT efficiency around 0.55 by 0.6-nm-thick Pt layer adsorption.The value is nearly four times larger than that of the Pt/Fe Ni sample without Gr and nearly twice the value of the Gr/Fe Ni sample without Pt adsorption.The efficiency of the enhanced SOT in Gr by Pt adatoms is also demonstrated by the field-free SOT magnetization switching process with a relatively low critical current density around 5.4 MA/cm^(2)in Gr/Pt/Fe Ni trilayers with the in-plane magnetic anisotropy.These findings pave the way for Gr spintronics applications,offering solutions for future low power consumption memories.展开更多
The spin–orbit torque via the spin Hall effect of heavy metals has shown promising prospect in driving the magnetization switching in spintronic devices due to the generated spin current from heavy metals.Recently,th...The spin–orbit torque via the spin Hall effect of heavy metals has shown promising prospect in driving the magnetization switching in spintronic devices due to the generated spin current from heavy metals.Recently,the 3d-light metals have been predicted the ability to generate orbital current and the associated orbital torques from the orbital Hall effect.However,few experiments have been carried out since it is quite hard to directly detect the orbital current-generated orbital torque.Here,we report an effective method to demonstrate the strong orbital torques in light metal Cr through a conversion process from orbital current to spin current by introducing the Pt interfacial layer in perpendicularly magnetized symmetric Pt/Co/Pt structures.A quite large and monotonically growth of orbital torque efficiency in Pt/Co/Pt/Cr with the increase of the thickness of Cr layer is obtained with the largest effective orbital torque efficiency around 2.6 Oe/(MA·cm^(-2))(1 Oe=79.5775 A·m^(-1)).The ability of orbital torque to drive the magnetization switching is also reported with the critical switching current density down to the order of 106A·cm^(-2).Our findings prove the efficiency for switching the magnetization from light metal Cr layers through the orbital Hall effect.展开更多
4月16日,由中央美术学院美术馆与意大利驻华使馆文化处联合主办的全球艺术教育推广项目中国首站“达·芬奇的艺术:不可能的相遇”在中央美术学院美术馆开幕。作为纪念达·芬奇逝世500周年的系列活动,本次展览利用“ Opera Omni...4月16日,由中央美术学院美术馆与意大利驻华使馆文化处联合主办的全球艺术教育推广项目中国首站“达·芬奇的艺术:不可能的相遇”在中央美术学院美术馆开幕。作为纪念达·芬奇逝世500周年的系列活动,本次展览利用“ Opera Omnia”技术,让广大公众集中观看达·芬奇17件分别收藏于卢浮宫、乌菲奇美术馆等世界级博物馆的代表作品。展开更多
随着“5G商用元年”的提出,人工智能、大数据分析的热潮不退,AR/VR的卷土重来,让新兴技术成为社会各界无法回避的话题。当代艺术的弄潮者凭借其想象力和跨学科能力,致力于新技术的思考、研究和应用。借着今曰美术馆“第三届今日未来馆&#...随着“5G商用元年”的提出,人工智能、大数据分析的热潮不退,AR/VR的卷土重来,让新兴技术成为社会各界无法回避的话题。当代艺术的弄潮者凭借其想象力和跨学科能力,致力于新技术的思考、研究和应用。借着今曰美术馆“第三届今日未来馆·机器人·间DE JA VU”展览举办的契机,本文整理了一些艺术家、策展人、学者、艺术机构负责人对于艺术与科技、技术互动可能性以及跨领域的艺术创作等代表性观点,以飨读者。展开更多
基金supported by the National Key R&D Program of China(Grant No.2021YFB3501304)the National Natural Science Foundation of China(Grant Nos.91963201 and 51671098)+4 种基金the 111 Project(Grant No.B20063)the Open Research Fund of Songshan Lake Materials Laboratory(Grant No.2023SLABFN05)the Program for Changjiang Scholars and Innovative Research Team in University PCSIRT(Grant No.IRT16R35)the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2021-ct01)the Natural Science Foundation of Gansu Province(Grant No.22JR5RA474)。
文摘Graphene(Gr)with widely acclaimed characteristics,such as exceptionally long spin diffusion length at room temperature,provides an outstanding platform for spintronics.However,its inherent weak spin–orbit coupling(SOC)has limited its efficiency for generating the spin currents in order to control the magnetization switching process for applications in spintronics memories.Following the theoretical prediction on the enhancement of SOC in Gr by heavy atoms adsorption,here we experimentally observe a sizeable spin–orbit torques(SOTs)in Gr by the decoration of its surface with Pt adatoms in Gr/Pt(t Pt)/Fe Ni trilayers with the optimal damping-like SOT efficiency around 0.55 by 0.6-nm-thick Pt layer adsorption.The value is nearly four times larger than that of the Pt/Fe Ni sample without Gr and nearly twice the value of the Gr/Fe Ni sample without Pt adsorption.The efficiency of the enhanced SOT in Gr by Pt adatoms is also demonstrated by the field-free SOT magnetization switching process with a relatively low critical current density around 5.4 MA/cm^(2)in Gr/Pt/Fe Ni trilayers with the in-plane magnetic anisotropy.These findings pave the way for Gr spintronics applications,offering solutions for future low power consumption memories.
基金the National Natural Science Foundation of China(Grant Nos.91963201 and 51671098)the 111 Project(Grant No.B20063)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University PCSIRT(Grant No.IRT16R35)the Natural Science Foundation of Gansu Province,China(Grant No.22JR5RA474).
文摘The spin–orbit torque via the spin Hall effect of heavy metals has shown promising prospect in driving the magnetization switching in spintronic devices due to the generated spin current from heavy metals.Recently,the 3d-light metals have been predicted the ability to generate orbital current and the associated orbital torques from the orbital Hall effect.However,few experiments have been carried out since it is quite hard to directly detect the orbital current-generated orbital torque.Here,we report an effective method to demonstrate the strong orbital torques in light metal Cr through a conversion process from orbital current to spin current by introducing the Pt interfacial layer in perpendicularly magnetized symmetric Pt/Co/Pt structures.A quite large and monotonically growth of orbital torque efficiency in Pt/Co/Pt/Cr with the increase of the thickness of Cr layer is obtained with the largest effective orbital torque efficiency around 2.6 Oe/(MA·cm^(-2))(1 Oe=79.5775 A·m^(-1)).The ability of orbital torque to drive the magnetization switching is also reported with the critical switching current density down to the order of 106A·cm^(-2).Our findings prove the efficiency for switching the magnetization from light metal Cr layers through the orbital Hall effect.
文摘4月16日,由中央美术学院美术馆与意大利驻华使馆文化处联合主办的全球艺术教育推广项目中国首站“达·芬奇的艺术:不可能的相遇”在中央美术学院美术馆开幕。作为纪念达·芬奇逝世500周年的系列活动,本次展览利用“ Opera Omnia”技术,让广大公众集中观看达·芬奇17件分别收藏于卢浮宫、乌菲奇美术馆等世界级博物馆的代表作品。
文摘随着“5G商用元年”的提出,人工智能、大数据分析的热潮不退,AR/VR的卷土重来,让新兴技术成为社会各界无法回避的话题。当代艺术的弄潮者凭借其想象力和跨学科能力,致力于新技术的思考、研究和应用。借着今曰美术馆“第三届今日未来馆·机器人·间DE JA VU”展览举办的契机,本文整理了一些艺术家、策展人、学者、艺术机构负责人对于艺术与科技、技术互动可能性以及跨领域的艺术创作等代表性观点,以飨读者。
