Strain-driven fractional spontaneous exchange bias in ferromagnetic/antiferromagnetic thin films with composition-graded ferromagnetic layer

2014 ◽  
Vol 115 (14) ◽  
pp. 143901 ◽  
Author(s):  
Nguyen N. Phuoc ◽  
C. K. Ong
Keyword(s):  
Thin Films ◽  
Exchange Bias ◽  
Ferromagnetic Layer

Investigations of the Magnetic Perpendicular Exchange Bias in L10 FePt/NiO Bilayer Thin Films

MRS Advances ◽  
2018 ◽  
Vol 3 (47-48) ◽  
pp. 2893-2898
Author(s):  
Zachary B. Leuty ◽  
Robert A. Mayanovic
Keyword(s):  
Thin Films ◽  
Exchange Bias ◽  
Giant Magnetoresistance ◽  
Magnetic Layer ◽  
Ferromagnetic Layer ◽  
Random Access ◽  
Perpendicular Magnetic Anisotropy ◽  
Magnetic Sensors ◽  
Magnetic Storage ◽  
Cross Sectional

ABSTRACTWe report on the exploration of perpendicular exchange bias in iron platinum/nickel oxide (FePt/NiO) bilayer thin films grown using pulsed laser deposition (PLD) on MgO (100) substrates. Exchange bias is an important property for giant magnetoresistance, and, as such has promise for applications in spin valves, magnetic sensors and magnetic random access memory. The magnetic L10 phase of FePt is known for having high perpendicular magnetic anisotropy, tunable coercivity/grain size and large magnetic storage density. The FePt layer was first deposited directly on MgO, followed by the deposition of the NiO layer on top of the FePt layer. The coercivity of the L10 FePt layer was tuned during growth to form a hard or soft magnetic layer. The FePt/NiO thin films grown for this study exhibit perpendicular exchange bias at 5K, as quantified using our SQUID measurements. XRD confirms parallel plane ordering between the MgO (200), FePt (002) and NiO (111) atomic planes while cross sectional TEM confirms the epitaxial growth of L10-FePt(001)<100>//MgO(100)<001> and the preferential growth of NiO on top of the FePt. Films of only FePt were grown to examine the surface architecture of the ferromagnetic layer and thus the interface of the FePt/NiO bilayer. The results from our XRD, TEM and magnetometry characterization of the FePt films and FePt/NiO bilayer thin films will be discussed.

scholarly journals Impact of ferromagnetic layer thickness on the spin pumping in Co60Fe20B20/Ta bilayer thin films

2021 ◽  
Author(s):  
Soumyarup Hait ◽  
Sajid Husain ◽  
Nanhe Kumar Gupta ◽  
Nilamani Behera ◽  
Ankit Kumar ◽  
...  
Keyword(s):  
Thin Films ◽  
Layer Thickness ◽  
Ferromagnetic Layer ◽  
Spin Pumping

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

Exchange Bias in CrO2/Cr2O3 Bilayer Thin Films

2006 ◽  
Vol 45 ◽  
pp. 2528-2533 ◽  
Author(s):  
S. Srinath ◽  
N.A. Frey ◽  
H. Srikanth ◽  
G.X. Miao ◽  
A. Gupta
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Variable Thickness ◽  
Exchange Bias ◽  
Exchange Coupling ◽  
Hysteresis Loops ◽  
Anisotropy Constant ◽  
Effective Magnetic Anisotropy ◽  
Large Anisotropy

We have investigated the exchange bias in CVD grown epitaxial CrO2/Cr2O3 bilayer thin films using hysteresis loops and resonant RF transverse susceptibility. M-H loops indicated an enhanced coercivity without appreciable loop shift and the transverse susceptibility in CrO2/Cr2O3 bilayers revealed features associated with both the ferromagnetic and antiferromagnetic phases. In addition, TS yielded large anisotropy constant (Keff) values depending on the fraction of Cr2O3 present. The large anisotropy fields observed cannot be accounted for by the variable thickness of CrO2 alone and are indicative of possible exchange coupling between CrO2 and Cr2O3 phases that significantly affects the effective magnetic anisotropy.

Ferromagnetic resonance evidence for a surface ferromagnetic layer in Co-Cr thin films

1986 ◽  
Vol 54-57 ◽  
pp. 1689-1690 ◽  
Author(s):  
M.L. Cofield ◽  
C.F. Brucker ◽  
J.S. Gau ◽  
J.T. Gerard
Keyword(s):  
Thin Films ◽  
Ferromagnetic Resonance ◽  
Ferromagnetic Layer

scholarly journals Comparison of Exchange-Bias Using Epitaxial and Polycrystalline Ir0.2Mn0.8 Antiferromagnetic Thin Films: a TEM and Lorentz TEM Study

2010 ◽  
Vol 16 (S2) ◽  
pp. 1914-1915
Author(s):  
A Kohn ◽  
A Kovacs ◽  
S-G Wang ◽  
C Wang ◽  
J Dean ◽  
...  
Keyword(s):  
Thin Films ◽  
Exchange Bias

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

scholarly journals Exchange bias and spin glass behavior in biphasic NiFe2O4/NiO thin films

2016 ◽  
Vol 419 ◽  
pp. 29-36 ◽  
Author(s):  
Andrew C. Pebley ◽  
Preston E. Fuks ◽  
Tresa M. Pollock ◽  
Michael J. Gordon
Keyword(s):  
Thin Films ◽  
Spin Glass ◽  
Exchange Bias ◽  
Spin Glass Behavior ◽  
Glass Behavior

Exchange bias in zinc ferrite-FeNiMoB based metallic glass composite thin films

2015 ◽  
Author(s):  
Lisha R ◽  
Hysen T ◽  
Geetha P ◽  
Aravind P. B ◽  
S. Ojha ◽  
...  
Keyword(s):  
Thin Films ◽  
Metallic Glass ◽  
Exchange Bias ◽  
Zinc Ferrite ◽  
Glass Composite ◽  
Composite Thin Films

Interface correlated exchange bias effect in epitaxial Fe3O4 thin films grown on SrTiO3 substrates

2014 ◽  
Vol 105 (24) ◽  
pp. 241604 ◽  
Author(s):  
Qiu-Xiang Zhu ◽  
Ming Zheng ◽  
Ming-Min Yang ◽  
Ren-Kui Zheng ◽  
Yu Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Exchange Bias ◽  
Bias Effect ◽  
Exchange Bias Effect
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