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STRUCTURE AND FERROMAGNETIC RESONANCE OF Fe/Cu SUPERLATTICES

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Acta Metallurgica Sinica(English Letters) 1991年第8期4卷 127-133页

作者： BI Siyun MA Xiaoding SONG Ruitian mei liangmo ZHAO Jiangao GUO Yicheng Shandong University,Jinan,China Shandong Univ Jinan China

Metallic Fe/Cu superlattice films on glass substrates were prepared by a dc-magnetion sputtering *** modulation behaviors and the crystal structures of the films were ex- amined by X-ray diffraction and transmission electron microscopy(TEM)respectively. Their magnetic properties were studied by means of ferromagnetic resonnance spectrometer and the vibrating sample *** results show that there exists a strong magnetic coupling between the neighbouring Fe layers and it is the coupling that affectes the magnetic properties of these superlattice films.

关键词： superlattice ferromagnetic resonance interface spin-wave resonance

Impulse-Coupling Coefficient of Laser-Surface Interaction in Air

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Chinese Physics Letters 1994年第4期11卷 250-252页

作者： mei liangmo XIA Yueyuan WANG Qingpu XU Bingzhang TAN Chunyu ZHAO Shengzhi WANG Xiangtai WANG Gongtang Department of Physics Shandong UniversityJinan 250100 Department of Physics Shandong Normal UniversityJinan 250002

Impulse-copling coefficients,for A1 and Cu samples with finite surface area irradiated in air by 1.06μm,10ns laser pulses produced by a Nd:YAG laser,have been measured experimentally.A modified theoretical model of impulse-coupling is proposed,which significantly improves the agreement between the calculated impulse-coupling coefficient and the measured one.

关键词： Nd:YAG 1.06μm laser

Giant Magnetoresistance Effect in Melt Spun CoCu granular Alloys

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Chinese Physics Letters 1994年第8期11卷 510-513页

作者： LI Min ZHAO Xuegen ZHAO Tongyun ZHAO Jiangao SHEN Baogen CHAI Weiping GU Yousong MAI Zhenhong mei liangmo Institute of Physics Academia SinicaBejjing 100080 Department of Physics Shandong UniversityJinan 250100

granular magnetic Co_(x)Cu_(1-x)(x=0.05-0.5)alloy ribbons were prepared by melt spinning method,and the structural,magnetotransport,magnetic properties and the effects of annealing on these properties were studied by x-ray diffraction,vibrating sample magnetometer,magnetoresistance measurement at room *** magnetoresistance was observed over a broad range of Co concentrations with a maximum magnetoresistance(MR)ratio of 7.8%(at x=0.20 and 500℃ annealing)under a magnetic field of *** MR ratio increases with the annealing temperature and reaches a maximum at about 500℃ and then *** dependence of MR and magnetization on magnetic field for various granule parameters were studied by controlling the nucleation and growth of Co granules.

关键词： resistance alloy annealing

REPLY BY LI Hua et al.

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Chinese Physics Letters 1988年第9期5卷 431-432页

作者： Hua Li Shouting Jiang liangmo mei Yicheng Kuo Gueilin Yang You Xu Hongru Zhai

In this communication we would like to reply to the comment of *** Xiedi on our paper(1).

关键词： al. comment REP

Magnetization-direction-dependent inverse spin Hall effect observed in IrMn/NiFe/Cu/YIG multilayer structure

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Chinese Physics B 2019年第3期28卷 333-336页

作者： Runrun Hao Ruxue Zang Tie Zhou Shishou Kang Shishen Yan Guolei Liu Guangbing Han Shuyun Yu liangmo mei School of Physics and State Key Laboratory of Crystal Materials Shandong University

The magnetization-direction-dependent inverse spin Hall effect(ISHE) has been observed in NiFe film during spin Seebeck measurement in IrMn/NiFe/Cu/yttrium iron garnet(YIG) multilayer structure, where the YIG and NiFe layers act as the spin injector and spin current detector, respectively. By using the NiFe/IrMn exchange bias structure, the magnetization direction of YIG(MYIG) can be rotated with respect to that of NiFe(MNiFe) with a small magnetic field, thus allowing us to observe the magnetization-direction-dependent inverse spin Hall effect voltage in NiFe layer. Compared with the situation that polarization direction of spin current(σs) is perpendicular to MNiFe, the spin Seebeck voltage is about 30% larger than that when σs and MNiFe are parallel to each other. This phenomenon may originate from either or both of stronger interface or bulk scattering to spin current when σs and MNiFe are perpendicular to each other. Our work provides a way to control the voltage induced by ISHE in ferromagnets.

关键词： spin current magnetic insulator inverse Hall effect

The Ambient Gas Effects on Pulsed Laser Ablation of Target

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光电子·激光 1996年第1期7卷 12-15页

作者： Gongtang Wang Xiangtai Wang Baoyuan Mian(Department of physics,Shandong Normal University,Jinan 250014)Bingzhang Xu liangmo mei(Department of physics.Shandong University,Jinan 250100) 山东师范大学物理系山东济南山东大学物理系山东济南

ＴｈｅＡｍｂｉｅｎｔＧａｓＥｆｆｅｃｔｓｏｎＰｕｌｓｅｄＬａｓｅｒＡｂｌａｔｉｏｎｏｆＴａｒｇｅｔ￥ＧｏｎｇｔａｎｇＷａｎｇ；ＸｉａｎｇｔａｉＷａｎｇ；ＢａｏｙｕａｎＭｉａｎ（Ｄｅｐａｒｔｍｅｎｔｏｆｐｈｙｓｉｃｓ，... 详细信息

ＴｈｅＡｍｂｉｅｎｔＧａｓＥｆｆｅｃｔｓｏｎＰｕｌｓｅｄＬａｓｅｒＡｂｌａｔｉｏｎｏｆＴａｒｇｅｔ￥ＧｏｎｇｔａｎｇＷａｎｇ；ＸｉａｎｇｔａｉＷａｎｇ；ＢａｏｙｕａｎＭｉａｎ（Ｄｅｐａｒｔｍｅｎｔｏｆｐｈｙｓｉｃｓ，ＳｈａｎｄｏｎｇＮｏｒｍａｌＵｎｉ...

关键词： Al￣+ ion mean projected range laser ablation ambient gas effect.

Spin-independent transparency of pure spin current at normal/ferromagnetic metal interface

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Chinese Physics B 2018年第3期27卷 401-404页

作者： Runrun Hao Hai Zhong Yun Kang Yufei Tian Shishen Yan Guolei Liu Guangbing Han Shuyun Yu liangmo mei Shishou Kang School of Physics and State Key Laboratory of Crystal Materials Shandong University Jinan 250100. China

The spin transparency at the normal/ferromagnetic metal （NM/FM） interface was studied in PffYIG/Cu/FM multilayers. The spin current generated by the spin Hall effect （SHE） in Pt flows into Cu/FM due to magnetic insulator YIG blocking charge current and transmitting spin current via the magnon current. Therefore, the nonlocal voltage induced by an inverse spin Hall effect （ISHE） in FM can be detected. With the magnetization of FM parallel or antiparallel to the spin polarization of pure spin currents （σsc）, the spin-independent nonlocal voltage is induced. This indicates that the spin transparency at the Cu/FM interface is spin-independent, which demonstrates that the influence of spin-dependent electro-chemical potential due to spin accumulation on the interfacial spin transparency is negligible. Furthermore, a larger spin Hall angle of Fe20Ni80 （Py） than that of Ni is obtained from the nonlocal voltage measurements.

关键词： spin transparency spin current magnetic insulator inverse Hall effect

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低维材料中的缺陷效应与电子态调控

科学通报 2021年第16期66卷 1998-2009页

作者：赵明文夏曰源梅良模山东大学物理学院济南250100

低维材料具有大的比表面积、独特的电子结构和优异性能,在新能源、信息等领域具有重要的应用前景.低维材料所具有的特殊电子态可以突破传统半导体材料的尺寸极限,是后摩尔时代重要的候选材料.如何有效地调控低维材料电子结构以满足特定... 详细信息

低维材料具有大的比表面积、独特的电子结构和优异性能,在新能源、信息等领域具有重要的应用前景.低维材料所具有的特殊电子态可以突破传统半导体材料的尺寸极限,是后摩尔时代重要的候选材料.如何有效地调控低维材料电子结构以满足特定功能的需要是实现这一应用的关键.本文从一维纳米管和二维层状材料中的"缺陷效应"出发,对我们课题组在低维材料电子结构调控方面的研究结果进行综述,揭示空位和吸附原子等点缺陷以及表面修饰和内部填充等对材料的电子结构、电子自旋极化和激发态特性的调控机制与规律,为低维材料在新型电子器件等领域的应用提供依据.

关键词：纳米管二维材料缺陷效应电子态调控第一性原理计算

氧分压对Zn1-xCoxO1-δ磁性半导体磁特性的调控作用

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金属学报 2008年第11期44卷 1399-1403页

作者：季刚张云鹏颜世申梅良模张泽北京工业大学固体微结构与性能研究所北京100124 山东大学物理学院济南250100

利用电子显微分析技术对高Co含量的室温铁磁性半导体Zn_(1-x)Co_xO_(1-δ)进行了微观表征.证明了氧含量是决定Zn_(1-x)Co_xO_(1-δ)薄膜微观结构和磁性能的重要因素.在缺氧环境下,薄膜由含有大量氧缺位的纤锌矿结构的Zn_(1-x)Co_xO_(1-... 详细信息

利用电子显微分析技术对高Co含量的室温铁磁性半导体Zn_(1-x)Co_xO_(1-δ)进行了微观表征.证明了氧含量是决定Zn_(1-x)Co_xO_(1-δ)薄膜微观结构和磁性能的重要因素.在缺氧环境下,薄膜由含有大量氧缺位的纤锌矿结构的Zn_(1-x)Co_xO_(1-δ)纳米晶(直径约5 nm)和填充其间的Zn-Co-O非晶相组成,两相对薄膜宏观磁性均有贡献;在富氧的环境下,非晶Zn-Co-O相消失,出现了CoO反铁磁相,纤锌矿结构Zn_(1-x)Co_xO_(1-δ)中的氧缺位大量减少,晶粒长大到10—20 nm,室温铁磁性逐渐减弱,直至消失.

关键词：室温铁磁性半导体氧分压氧缺位调控