Angular dependence of the magnetization reversal in exchange-biased Fe∕MnF2

Arenholz, Elke; Liu, Kai

doi:10.1063/1.2058207

Cited by 21 publications

(27 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While at high temperature, the critical t AFM increases, the peak of H eb moves to higher t AFM and gradually disappear 10 . Compared to the extensive investigation on polycrystalline EB systems, there are only a few works focused on epitaxial films 11,12 . Thanks to the clear AFM/FM interface and the well-controlled magnetic configuration near the AFM/FM interface, the epitaxial exchange biased bilayers is regarded as the ideal systems for investigating the underlying physics of exchange bias, and have attracted much attention in the recent years 13 .…”

Section: Introductionmentioning

confidence: 99%

“…Considering both K eb and K u , the value of EB and coercivity for the polycrystalline EB systems can be numerically fitted by the Stoner-Wohlfarth model 18 . In epitaxial EB systems, the intrinsic magnetocrystalline anisotropy needs to be further considered, which results in multi-step hysteresis loops and a complex angular dependent behavior 11,12,14 . An effective field model, which considers the contributions to the effective field acting on the FM layer during magnetization reversal, was developed by Arenholz et al, to quantitatively interpret the complicated angular dependent switching fields 12 .…”

Section: Introductionmentioning

confidence: 99%

“…In epitaxial EB systems, the intrinsic magnetocrystalline anisotropy needs to be further considered, which results in multi-step hysteresis loops and a complex angular dependent behavior 11,12,14 . An effective field model, which considers the contributions to the effective field acting on the FM layer during magnetization reversal, was developed by Arenholz et al, to quantitatively interpret the complicated angular dependent switching fields 12 . On the other hand, both the multi-step loops and the angular dependent behaviors for the epitaxial Fe single layers can be described by a model based on domain wall (DW) nucleation 19,20 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Antiferromagnetic layer thickness dependence of the magnetization reversal in the epitaxial MnPd/Fe exchange bias system

2011

View full text Add to dashboard Cite

We report an investigation on the antiferromagnetic layer thickness dependence of magnetization reversal in c-axis oriented MnPd/Fe epitaxial exchange biased bilayers. Several kinds of multi-step loops were observed for different samples measured at various field orientation. The evolution of the angular dependent magnetic behavior evolving from a representative Fe film to the exchange biased bilayers was revealed. With increase of the thickness of the antiferromagnetic layers, asymmetrically shaped loops and biased two-step loops are induced by exchange bias. Including the unidirectional anisotropy, a model based on the domain nucleation and propagation was developed, which can nicely describe the evolution of the magnetic behaviors for MnPd/Fe bilayers and correctly predicts the critical angles separating the occurrence of different magnetic switching processes. For fields applied along the bias direction, the 180 o magnetic reversal changes from two successive 90 o domain wall nucleations to a single 180 o domain wall nucleation at a critical thickness of the MnPd layer.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Antiferromagnetic layer thickness dependence of the magnetization reversal in the epitaxial MnPd/Fe exchange bias system

2011

View full text Add to dashboard Cite

show abstract

“…Arenholz et al 8 and Tillmanns et al 9 have observed that in twinned Fe/MnF 2 films, the shape of a kinked hysteresis loop evolves sensitively with the angle between the measurement and bias fields. Other studies have examined the dependence of the magnetization reversal mechanism on the exchange field and anisotropy fields in the samples.…”

mentioning

confidence: 99%

Angular dependence of exchange anisotropy on the cooling field in ferromagnet/fluoride thin films

Olamit

Schuller

et al. 2006

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

Exchange anisotropy in ferromagnet/antiferromagnet (FM/AF) films is usually introduced along the cooling field or FM magnetization direction. Here we investigate the dependence of the exchange anisotropy, loop bifurcation, and reversal mechanism on the cooling field direction using vector magnetometry. Three types of samples (FM=Fe, Ni /AF = FeF 2 , MnF 2 ) have been studied where the AF layer is epitaxial (110), twinned (110), and polycrystalline. With an epitaxial AF which has one spin axis, the cooling field orients the exchange field along the spin axis. Applying the cooling field perpendicular to the spin axis results in bifurcated loops, whose shape evolves with the cooling field geometry and strength. With a twinned AF where there are two orthogonal spin axes, the exchange field direction is along the bisector of the spin axes that encompass the cooling field. With a polycrystalline AF, the exchange field direction is the same as the cooling field. Transverse hysteresis loops show that when the exchange field has a component perpendicular to the applied field, the magnetization reversal occurs by rotation in the direction of the perpendicular component. Our results demonstrate that in fluoride films, the exchange field is established primarily by the AF anisotropy direction, and only to a lesser extent the cooling field or the magnetization Phys. Rev. B, in press; cond-mat/0512257 2 direction. The bifurcated loops are due to a distribution of AF anisotropies and large AF domain sizes. Furthermore, the magnetization reversal process is extremely sensitive to the exchange field direction.

show abstract

“…10,15 We have recently shown in FeF 2 and MnF 2 based systems that the switching mechanism depends on the AF crystallinity, especially on the alignment of the applied field with respect to the AF anisotropy axes. 9,16,17 For example, FM/epitaxial-FeF 2 thin films have a single AF spin axis along which the exchange field would also point. With a small misalignment ͑ϳ2°͒, the switching is clearly dominated by rotation.…”

mentioning

confidence: 99%

Irreversibility of magnetization rotation in exchange biased Fe/epitaxial-FeF2 thin films

Olamit

Liu

et al. 2007

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

Magnetization reversal via rotation is typical in ferromagnet/antiferromagnet exchange biased systems. The reversibility of the rotation is a manifestation of the microscopic reversal process. The authors have investigated the magnetization reversal in Fe/epitaxial-FeF2 thin films using vector magnetometry and first-order reversal curves. The reversal is predominantly by rotation as the applied field makes an angle with the antiferromagnet spin axis, mostly irreversible at small angles and reversible at larger angles. A modified Stoner-Wohlfarth model reproduces the overall trend of the irreversibility evolution. The remaining discrepancies between the modeled and measured irreversibilities may be attributed to local incomplete domain walls.

show abstract

Angular dependence of the magnetization reversal in exchange-biased Fe∕MnF2

Cited by 21 publications

References 15 publications

Antiferromagnetic layer thickness dependence of the magnetization reversal in the epitaxial MnPd/Fe exchange bias system

Antiferromagnetic layer thickness dependence of the magnetization reversal in the epitaxial MnPd/Fe exchange bias system

Angular dependence of exchange anisotropy on the cooling field in ferromagnet/fluoride thin films

Irreversibility of magnetization rotation in exchange biased Fe/epitaxial-FeF2 thin films

Contact Info

Product

Resources

About