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

Olamit, Justin; Liu, Kai; Li, Zhi-Pan; Schuller, Iván K.

doi:10.1063/1.2431784

Cited by 25 publications

(26 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A FORC distribution is determined by a mixed second order derivative of the magnetization M(H R , H) 23 30 and powerful in qualitative and quantitative magnetic phase identification. 27,31 It is ideally suited Page 5 of 25 for "fingerprinting" the presence of magnetic inhomogeneities, which are manifested as unique patterns in FORC diagrams.…”

Section: Methodsmentioning

confidence: 99%

Temperature-dependent magnetization reversal in(Co∕Pt)∕Rumultilayers

et al. 2008

Self Cite

View full text Add to dashboard Cite

TitleTemperature-dependent magnetization reversal in (Co/Pt)/Ru multilayers AbstractAntiferromagnetically coupled (Co/Pt)/Ru multilayers with perpendicular anisotropy have been shown to exhibit both vertically and laterally correlated magnetization reversal modes.In this work the magnetization reversal of a multilayer film whose layer thicknesses have been tuned to be at the phase boundary between the two reversal modes has been investigated as a function of temperature using the first-order reversal curve (FORC) method. At high temperatures reversal via vertically correlated stripe domains throughout the film thickness is observed, similar to that in Co/Pt films without the Ru spacers. At low temperatures antiferromagnetic (AF) interlayer exchange coupling dominates, and laterally correlated reversal is observed with an AF coupled remanent state. Under magnetic field cycling, dipolar fields can transform the sample back into a vertically correlated domain state, thus leading to an exotic behavior with FORC's existing outside the major hysteresis loop. Calculations show that the laterally correlated reversal mode is indeed slightly more stable, and the crossover to vertically correlated reversal can be induced by temperature as well as magnetic field.

show abstract

Section: Methodsmentioning

confidence: 99%

Temperature-dependent magnetization reversal in(Co∕Pt)∕Rumultilayers

et al. 2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…The FORC method is based on the procedure described by Mayergoyz 22 . It is a versatile yet a simple technique which provides plethora of quantitative information apart from the evaluations of the interaction in the hysteretic system regardless of whether it is bulk 23 , thin film [24][25][26][27][28][29] , nanowire [30][31][32] , magnetic tunnel junction 33,34 , ferroelectric switching 19,35 , patterned system 36,37 and permanent magnets 38 . In the present work, the irreversible switching processes during the magnetization reversal have been investigated for two systems namely viz.…”

Section: Introductionmentioning

confidence: 99%

Investigation on non-exchange spring behaviour and exchange spring behaviour: A first order reversal curve analysis

Roy¹,

Sreenivasulu²,

Kumar³

2013

Applied Physics Letters

View full text Add to dashboard Cite

The magnetization behaviour of the soft Cobalt Ferrite-hard Strontium Ferrite nanocomposite is tuned from the non exchange spring nature to the exchange spring nature, by controlling the particle size of the soft Cobalt Ferrite in the Cobalt Ferrite: Strontium Ferrite (1:8) nanocomposite. The relative strength of the interaction governing the magnetization process in the nanocomposites is investigated using Henkel plot and First Order Reversal Curve (FORC) method. The FORC method has been utilized to understand the magnetization reversal behaviour as well as the extent of the irreversible magnetization present in both the nanocomposites having smaller and larger particle size of the Cobalt Ferrite. The magnetization process is primarily controlled by the domain wall movement in the nanocomposites. Using the FORC distribution in the (H a , H b ) co-ordinate, the onset of the nucleation field, invasion of the domain wall from the soft to the hard phase, domain wall annihilation and the presence of the reversible magnetization with the applied reversal field for both the nanocomposites has been investigated. It has been found that for the composite having lower particle size of the soft phase shows a single switching behaviour corresponding to the coherent reversal of the both soft and hard phases. However, the composite having higher Cobalt Ferrite particle size shows two peak behaviour in the FORC distribution resembling individual switching of the soft and hard phases. The FORC distribution in (H u , H c ) co-ordinate and the Henkel measurement confirms the dominant exchange interaction in the nanocomposites exhibiting exchange spring behaviour where as the occurrence of both the dipolar and exchange interaction is substantiated for the non exchange coupled nanocomposite. The asymmetric nature of the FORC distribution at H c = 0 Oe for both the nanocomposites validates the intercoupled nature of the reversible and irreversible magnetizations in both the nanocomposites. It is also concluded that the contribution of the reversible magnetization is more in the nanocomposite having lower particle size of the Cobalt Ferrite compared to the nanocomposite having higher particle size of the Cobalt Ferrite.

show abstract

“…They can be used to track the nanomagnets that reverse via VS, regardless whether the remanent state is VS or not. We have recently shown in sub-100 nm Fe nanodots, using a first-order reversal curve ͑FORC͒ technique, [15][16][17][18] that SD and VS indeed have drastically different "fingerprints" due to their respective irreversible magnetization switching mechanisms. 19 In this letter, we quantitatively investigate the temperature dependent SD-VS transition in arrays of 67 nm diameter Fe nanodots.…”

mentioning

confidence: 99%

“…19 Furthermore, the integration I Irrev = ͐ ͑H R , H͒dH R dH = ͐ ͑H B , H C ͒dH B dH C captures the total amount of irreversible magnetic switching in a sample. 18 Thus, it can be used to quantitatively determine the amount of magnetic phases. 19,23 By selectively integrating the normalized FORC distribution over the boxed region in Fig.…”

mentioning

confidence: 99%

Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots

Dumas

Liu

et al. 2007

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

Magnetization reversal in nanomagnets via a vortex state, although often investigated at the remanent state, may not necessarily display a zero remanence or a highly pinched hysteresis loop. In contrast, the irreversible nucleation/annihilation events are clear indications of a vortex state. In this work, temperature induced single domain–vortex state transition has been investigated in 67nm Fe nanodots using a first-order reversal curve (FORC) technique. The two phase coexistence is manifested as different features in the FORC distribution. At lower temperatures, it becomes harder to nucleate and annihilate vortices and the amount of single domain dots increases.

show abstract

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

Cited by 25 publications

References 26 publications

Temperature-dependent magnetization reversal in(Co∕Pt)∕Rumultilayers

Temperature-dependent magnetization reversal in(Co∕Pt)∕Rumultilayers

Investigation on non-exchange spring behaviour and exchange spring behaviour: A first order reversal curve analysis

Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots

Contact Info

Product

Resources

About