scholarly journals Perpendicular exchange bias in antiferromagnetic-ferromagnetic nanostructures

2004 ◽  
Vol 84 (18) ◽  
pp. 3696-3698 ◽  
Author(s):  
J. Sort ◽  
B. Dieny ◽  
M. Fraune ◽  
C. Koenig ◽  
F. Lunnebach ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Ferromagnetic Nanostructures

Exchange bias and anomalous vertical shift of the hysteresis loops in milled Fe/MnO2 material

2006 ◽  
Vol 299 (1) ◽  
pp. 11-20 ◽  
Author(s):  
E.C. Passamani ◽  
C. Larica ◽  
C. Marques ◽  
J.R. Proveti ◽  
A.Y. Takeuchi ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Hysteresis Loops ◽  
Vertical Shift

Strain Control of Phase Transition and Exchange Bias in Flexible Heusler Alloy Thin Films

2021 ◽  
Author(s):  
Yechao Ling ◽  
Yong Hu ◽  
Haobo Wang ◽  
Ben Niu ◽  
Jiawei Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Exchange Bias ◽  
Heusler Alloy ◽  
Strain Control

scholarly journals Electrically Enhanced Exchange Bias via Solid-State Magneto-ionics

2021 ◽  
Author(s):  
Peyton D. Murray ◽  
Christopher J. Jensen ◽  
Alberto Quintana ◽  
Junwei Zhang ◽  
Xixiang Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Exchange Bias ◽  
Electrically Enhanced

scholarly journals Intra-unitcell cluster-cluster magnetic compensation and large exchange bias in cubic alloys

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Bimalesh Giri ◽  
Bhawna Sahni ◽  
C. Salazar Mejía ◽  
S. Chattopadhyay ◽  
Uli Zeitler ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Magnetic Compensation

scholarly journals Exchange-bias and magnetic anisotropy fields in core–shell ferrite nanoparticles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
F. G. Silva ◽  
J. Depeyrot ◽  
Yu. L. Raikher ◽  
V. I. Stepanov ◽  
I. S. Poperechny ◽  
...  
Keyword(s):  
Spin Glass ◽  
Magnetic Moment ◽  
Exchange Bias ◽  
Uniaxial Anisotropy ◽  
Thermal Fluctuations ◽  
High Amplitude ◽  
Spin Coupling ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

AbstractExchange bias properties of MnFe$$_2$$ 2 O$$_4$$ 4 @$$\gamma$$ γ –Fe$$_2$$ 2 O$$_3$$ 3 core–shell nanoparticles are investigated. The measured field and temperature dependencies of the magnetization point out a well-ordered ferrimagnetic core surrounded by a layer with spin glass-like arrangement. Quasi-static SQUID magnetization measurements are presented along with high-amplitude pulse ones and are cross-analyzed by comparison against ferromagnetic resonance experiments at 9 GHz. These measurements allow one to discern three types of magnetic anisotropies affecting the dynamics of the magnetic moment of the well-ordered ferrimagnetic NP’s core viz. the easy-axis (uniaxial) anisotropy, the unidirectional exchange-bias anisotropy and the rotatable anisotropy. The uniaxial anisotropy originates from the structural core–shell interface. The unidirectional exchange-bias anisotropy is associated with the spin-coupling at the ferrimagnetic/spin glass-like interface; it is observable only at low temperatures after a field-cooling process. The rotatable anisotropy is caused by partially-pinned spins at the core/shell interface; it manifests itself as an intrinsic field always parallel to the external applied magnetic field. The whole set of experimental results is interpreted in the framework of superparamagnetic theory, i.e., essentially taking into account the effect of thermal fluctuations on the magnetic moment of the particle core. In particular, it is found that the rotatable anisotropy of our system is of a uniaxial type.

scholarly journals Tailoring exchange bias in reentrant spin glass by ferromagnetic cluster size engineering

APL Materials ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 011104
Author(s):  
Fanghua Tian ◽  
Xiaoqin Ke ◽  
Kaiyan Cao ◽  
Dingchen Wang ◽  
Qizhong Zhao ◽  
...  
Keyword(s):  
Spin Glass ◽  
Exchange Bias ◽  
Cluster Size ◽  
Ferromagnetic Cluster ◽  
Reentrant Spin Glass

Giant exchange bias induced via tuning interfacial spins in polycrystalline Fe3O4/CoO bilayers

2021 ◽  
Author(s):  
Fanghua Tian ◽  
Yebei Li ◽  
Qizhong Zhao ◽  
Kaiyan Cao ◽  
Dingchen Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Exchange Bias

A giant exchange bias of 9600 Oe was achieved under a magnetic field HFC = 20 kOe in Fe3O4/CoO films.

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