Detection of the static and kinetic pinning of domain walls in ferromagnetic nanowires

Sung-Min Ahn; Kyoung-Woong Moon; Dong-Hyun Kim; Sug-Bong Choe
October 2009
Applied Physics Letters;10/12/2009, Vol. 95 Issue 15, p152506
Academic Journal
Two distinct pinning mechanisms named as kinetic and static pinning of magnetic domain wall (DW) are experimentally resolved. Both the pinning situations are realized at an artificial notch on U-shaped Permalloy nanowires, depending on the initial DW states, moving or pinned. The kinetic depinning field—a critical field for a moving DW to be trapped at a notch—is revealed to be distinguishably smaller than the static depinning field—a critical field to depin a trapped DW at the notch. Based on one-dimensional collective model, the discrepancy is explained by the tilting angle of the moving DW.


Related Articles

  • Temperature dependence of carrier spin polarization determined from current-induced domain wall motion in a Co/Ni nanowire. Ueda, K.; Koyama, T.; Hiramatsu, R.; Chiba, D.; Fukami, S.; Tanigawa, H.; Suzuki, T.; Ohshima, N.; Ishiwata, N.; Nakatani, Y.; Kobayashi, K.; Ono, T. // Applied Physics Letters;5/14/2012, Vol. 100 Issue 20, p202407 

    We have investigated the temperature dependence of the current-induced magnetic domain wall (DW) motion in a perpendicularly magnetized Co/Ni nanowire at various temperatures and with various applied currents. The carrier spin polarization was estimated from the measured domain wall velocity. We...

  • Domain wall width and velocity behaviors in notched magnetic devices. Kim, Se Dong; Chun, Byong Sun; Kim, Young Keun // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09F504 

    Current-induced domain wall motion on a magnetic strip has been studied for its potential application to magnetic logic and memory devices. In this study, we carried out a series of calculations to investigate the changes of the domain wall velocity and width as a function of the notch shape...

  • Simulated domain wall dynamics in magnetic nanowires. Kunz, Andrew // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08G107 

    The simulated domain wall dynamics in rectangular 10 nm thick, 2000 nm long Permalloy wires of varying width is presented. In the absence of an applied field the static domain wall length is found to be linearly dependent to the width of the nanowire. As magnetic fields of increasing strength...

  • Micromagnetic analysis of switching and domain structure in amorphous metallic nanowires. Stoleriu, Laurentiu; Pinzaru, Ciprian; Stancu, Alexandru // Applied Physics Letters;3/19/2012, Vol. 100 Issue 12, p122404 

    This paper describes a comprehensive micromagnetic model for the observed complex magnetic domains structures in amorphous wires with positive and negative magnetostriction with or without a glass cover. Many experimental studies and theoretical analysis have suggested several typical domain...

  • Influence of pulse amplitude and rise time on field-induced domain wall propagation in Ni80Fe20 nanowires. Weerts, K.; Neutens, P.; Lagae, L.; Borghs, G. // Journal of Applied Physics;May2008, Vol. 103 Issue 9, p094307 

    We have studied the field-induced propagation of domain walls (DWs) in magnetic nanowires by time-resolved magneto-optical Kerr microscopy. Magnetic field pulses with variable field amplitude lead to a DW velocity up to 500 m/s in 750 nm wide Ni80Fe20 nanowires, exceeding many other previous...

  • Condition of the ratchet effect of a magnetic domain wall motion under an asymmetric potential energy. Piao, Hong-Guang; Zhang, Xiaozhong; Choi, Hyeok-Cheol; Kim, Dong-Hyun; You, Chun-Yeol // Journal of Applied Physics;Apr2012, Vol. 111 Issue 7, p07D301 

    We have investigated the ratchet effect of magnetic domain wall (DW) motion in a straight ferromagnetic nanowire under ac magnetic field by means of micromagnetic simulation. A structure-stable DW ratchet effect along the ferromagnetic nanowire is observed utilizing an asymmetric potential...

  • Angular dependence of the magnetic properties of cylindrical diameter modulated Ni80Fe20 nanowires. Tejo, F.; Vidal-Silva, N.; Espejo, A. P.; Escrig, J. // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17D136-1 

    We have investigated numerically the angular dependence of the coercivity and remanence of cylindrical diameter modulated Ni80Fe20 nanowires. We observed that the system always starts reversing its magnetization through the thickest segment by means of a quite complex reversal process,...

  • Magnetic field dependence of the domain wall resistance in a quantum wire. Phirouznia, A.; Tehranchi, M. M.; Ghanaatshoar, M. // European Physical Journal B -- Condensed Matter;Nov2006, Vol. 54 Issue 1, p103 

    For an ideal one-dimensional ferromagnetic wire with a magnetic domain wall (DW), contribution of the DW to the resistivity of the system has been investigated. We have studied the resistance due to the magnetic impurities in the domain wall which was suspended in a weak magnetic field for two...

  • Local domain structure of exchange-coupled NiFe/CoO nanowire probed by nonlocal spin valve measurement. Kimura, T.; Otani, Y. // Journal of Applied Physics;Apr2008, Vol. 103 Issue 8, p083915 

    We investigate the local magnetization process in a 100-nm-wide Permalloy/CoO exchange-coupled wire by means of nonlocal spin valve measurements for a structure with lateral geometry. The domain structure in the exchange-coupled wire is found to change with the direction of the exchange bias....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics