Dual behavior of antiferromagnetie uncompensated spins in NiFe/IrMn exchange biased bilayers

S. K. Mishra; F. Radu; S. Valencia; D. Schmitz; E. Schierle; H. A. Duerr; W. Eberhardt

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Dual behavior of antiferromagnetie uncompensated spins in NiFe/IrMn exchange biased bilayers

机译：NiFe / IrMn交换偏置双层中抗铁磁非补偿自旋的双重行为

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We present a comprehensive study of the exchange bias effect in a model system. Through numerical analysis of the exchange bias and coercive fields as a function of the antiferromagnetie layer thickness we deduce the absolute value of the averaged anisotropy constant of the antiferromagnet. We show that the anisotropy of IrMn exhibits a finite size effect as a function of thickness. The interfacial spin disorder involved in the data analysis is further supported by the observation of the dual behavior of the interfacial uncompensated spins. Utilizing soft x-ray resonant magnetic reflectometry we have observed that the antiferromagnetie uncompensated spins are dominantly frozen with nearly no rotating spins due to the chemical intermixing, which correlates to the inferred mechanism for the exchange bias.

机译：我们对模型系统中的汇率偏差效应进行全面研究。通过对作为反铁磁层厚度的函数的交换偏置和矫顽场的数值分析，我们推导出了反铁磁体的平均各向异性常数的绝对值。我们表明，IrMn的各向异性表现出有限的尺寸效应作为厚度的函数。通过观察界面未补偿自旋的双重行为，进一步支持了数据分析中的界面自旋失调。利用软X射线共振磁反射法，我们已经观察到由于化学混合，抗铁磁未补偿的自旋主要由于几乎没有旋转的自旋而冻结，这与推断的交换偏压机理有关。

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来源
《Physical review》 |2010年第21期|P.212404.1-212404.4|共4页
作者
S. K. Mishra; F. Radu; S. Valencia; D. Schmitz; E. Schierle; H. A. Duerr; W. Eberhardt;
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作者单位

Helmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

rnHelmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

rnHelmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

rnHelmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

rnHelmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

rnHelmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

rnHelmholtz-Zentrum fuer Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany;

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magnetic properties of interfaces (multilayers, superlattices, heterostructures); magnetization reversal mechanisms;

机译：界面的磁性（多层;超晶格;异质结构）;磁化反转机制;

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专利

1. Parallel ferromagnetic resonance and spin-wave excitation in exchange-biased NiFe/IrMn bilayers [J] . Marcos Antonio de Sousa, Fernando Pelegrini, Willian Alayo, Physica, B. Condensed Matter . 2014,第Null期

机译：交换偏置的NiFe / IrMn双层膜中的平行铁磁共振和自旋波激发
2. Uncompensated spins in trilayer CoFe/IrMn/NiFe exchange bias: Soft x-ray resonant magnetic scattering study [J] . Lee J.-S., Kao C.-C., Jang H., Journal of Physics. Condensed Matter . 2011,第25期

机译：三层CoFe / IrMn / NiFe交换偏压中的未补偿自旋：软X射线共振磁散射研究
3. Biaxial anisotropy driven asymmetric kinked magnetization reversal in exchange-biased IrMn/NiFe bilayers [J] . Himanshu Fulara, Sujeet Chaudhary, Subhash C. Kashyap Applied Physics Letters . 2013,第5期

机译：交换偏置的IrMn / NiFe双层中双轴各向异性驱动的不对称扭折磁化反转
4. Magnetoresistance Investigations in Exchange-Biased IrMn/NiFe Bilayers [C] . Himanshu Fulara, Sujeet Chaudhary, Subhash C. Kashyap DAE Solid State Physics Symposium . 2014

机译：交换偏见的IRMN / NIFE双层磁阻调查
5. Using the anisotropic magnetoresistance technique on exchange biased bilayers with dispersed pinning. [D] . Brown, Heather Lea. 2003

机译：将各向异性磁阻技术应用于带有分散钉扎的交换偏置双层上。
6. Mapping motion of antiferromagnetic interfacial uncompensated magnetic moment in exchange-biased bilayers [O] . X. Zhou, L. Ma, Z. Shi, -1

机译：交换偏置双层中反铁磁界面未补偿磁矩的映射运动
7. Dual Behavior of Antiferromagnetic Uncompensated Spins in NiFe/IrMn Exchange Biased Bilayers [O] . Mishra, S. K., Radu, F., Valencia, S., 2009

机译：NiFe / Irmn中反铁磁无补偿自旋的双重行为交换偏见双层

Dual behavior of antiferromagnetie uncompensated spins in NiFe/IrMn exchange biased bilayers

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