Angular dependence of magnetization reversal process in exchange coupled ferromagnetic/antiferromagnetic bilayers

Liu, Z.Y.; Adenwalla, Shireen

doi:10.1063/1.1554760

Cited by 16 publications

(20 citation statements)

References 18 publications

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“…MOKE studies, accessing both longitudinal and transverse magnetization components, are scarce for exchange biased systems. [7][8][9] It is therefore important to analyze how coherent magnetization rotation manifests itself in a well-defined MOKE signal.…”

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confidence: 99%

Magneto-optical study of magnetization reversal asymmetry in exchange bias

Tillmanns

Oertker

Beschoten

et al. 2006

Applied Physics Letters

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The asymmetric magnetization reversal in exchange biased Fe/MnF 2 involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. This provides a fast and powerful probe of coherent magnetization reversal as well as its chirality. Surprisingly, the sign and asymmetry of the transverse magnetization component of Fe/MnF 2 change with the angle between cooling and measurement fields.

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confidence: 99%

Magneto-optical study of magnetization reversal asymmetry in exchange bias

Tillmanns

Oertker

Beschoten

et al. 2006

Applied Physics Letters

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“…38 Likewise, they have pointed out that this feature can be revealed clearly in the transverse hysteresis loops. However, the interfacial exchangecoupling energy is not considered in their work.…”

Section: Magnetization Reversal Processesmentioning

confidence: 99%

“…This similar results have also been reported by Liu et al without considering the interfacial exchange-coupling interaction. 38 As the critical angles are related to obtain the maximal H EB and the minimal H C (H C = 0) simultaneously, more intensive researches especially the experimental studies about the critical angles should be carried out in further works. The representative hysteresis loops for monostable state are summarized in Fig.12.…”

Section: The Situation Of Monostable Statementioning

confidence: 99%

“…38,39 For example, Liu et al have studied the effect of the helical structure on the ADEB and the magnetization reversal processes of NiFe/NiO bilayers. 38 However, the interfacial exchange coupling energy were not considered in their work, which leads to an incomplete discussion about the ADEB. Additionally, Radu et al have also investigated the ADEB by assuming that the FM magnetization is always perpendicular to the applied field during the magnetization reversal processes.…”

Section: Introductionmentioning

confidence: 99%

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The angular dependence of the exchange bias under the planar domain wall model

Bai

2015

AIP Advances

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Based on the principle of minimal energy, the angular dependence of exchange bias (ADEB) under planar domain wall model has been investigated in detail. Three different types of the initial states, monostable, bistable and tristable states, will be formed in exchange-biased systems by adjusting the relative strength of the uniaxial anisotropy, unidirectional anisotropy and the planar domain wall energy. These initial states determine the ADEB directly. The jump phenomena were still existent in the ADEB. Additionally, it can be found that the magnetization reversal mode is sensitive to the orientation of the magnetic field. Two distinct modes of the magnetization rotation, half-plane rotation and whole-plane rotation, can be observed when the applied field points along different orientations. These modes of the magnetization rotation can be identified by different features of the transverse hysteresis loops. Our investigations about the ADEB and the magnetization reversal modes are helpful to interpret the magnetic behaviors of some exchange-biased systems, which can be described by planar domain wall model.

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“…Magnetic hysteresis (M-H) loops from a vibrating sample magnetometer (VSM), a superconducting quantum interference device (Ed-the abbreviation is unnecessary as it is not used anywhere else in the paper), and a magnetooptic Kerr effect (MOKE) magnetometer usually provide a single magnetization component, parallel (M ⎟⎜ ) or perpendicular (M ⊥ ) to an applied field H. Meanwhile, it is possible to measure both the M ⎟⎜ -H and M ⊥ -H loops from a longitudinal MOKE (L-MOKE) measurement by rotating both one sample and one magnet by 90 degrees and fixing the others for an oblique incident s-or p-polarized beam [1][2][3]. Moreover, because a direct comparison between the M ⎟⎜ -H and M ⊥ -H loops is possible in this measurement geometry and the M ⊥ -H loop reveals the chirality, these allow us to determine the relative magnitude and direction of magnetization during reversal in a magnetic layer [2,4].…”

Section: Introductionmentioning

confidence: 99%

Magnetization Reversal of Exchange-biased Bilayers and Trilayers Probed using Front and Back LT-MOKE

Kim¹,

Kim²,

Choi³

et al. 2009

Journal of Magnetics

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Magneto-optical Kerr effect (MOKE) magnetometry was used to investigate magnetization reversal dynamics in 30-nm NiFe/15-nm FeMn, 15-nm FeMn/30-nm CoFe bilayers, and 30-nm NiFe/(2,10)-nm FeMn/30-nm CoFe trilayers. The in-plane magnetization components of each ferromagnetic layer, both parallel and perpendicular to the applied field, were separately determined by measuring the longitudinal and transverse MOKE hysteresis loops from both the front and back sides of the film for an oblique incident s-polarized beam. The magnetization of the FeMn/CoFe bilayer was reversed abruptly and symmetrically through nucleation and domain wall propagation, while that of the NiFe/FeMn bilayer was reversed asymmetrically with a dominant rotation. In the NiFe/FeMn/CoFe trilayers, the magnetic reversal of the two ferromagnetic layers proceeded via nucleation and domain wall propagation for 2-nm FeMn, but via asymmetric rotation for 10-nm FeMn. The exchange-biased ferromagnetic layers showed the magnetization reversal along the same path in the film plane for the decreasing and increasing field branches from transverse MOKE hysteresis loops, which can be qualitatively explained by the theoretical model of the exchange-biased ferromagnetic/antiferromagnetic systems.

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Angular dependence of magnetization reversal process in exchange coupled ferromagnetic/antiferromagnetic bilayers

Cited by 16 publications

References 18 publications

Magneto-optical study of magnetization reversal asymmetry in exchange bias

Magneto-optical study of magnetization reversal asymmetry in exchange bias

The angular dependence of the exchange bias under the planar domain wall model

Magnetization Reversal of Exchange-biased Bilayers and Trilayers Probed using Front and Back LT-MOKE

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