Fabrication and magnetic properties of CoxPd1−x composite nanowire

Hu, Hao; Chen, H.Y.; Yu, Shiyong; Chen, L.J.; Chen, J.L.; Wu, Guangheng

doi:10.1016/j.jmmm.2005.03.093

Cited by 35 publications

(11 citation statements)

References 13 publications

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“…While Co-rich nanowire system denotes the presence of a clear transverse anisotropy, the Pd-rich CoPd nanowire array exhibits a strong longitudinal anisotropy. Similarly to the case of CoNi nanowire arrays, increasing the Pd content gives rise to the change of sign of the effective anisotropy [23,36].…”

mentioning

confidence: 92%

“…As Ni is incorporated in the composition, the hcp phase nearly disappears, and fcc-crystal phase is detected [21,34]. For CoPd nanowires, fcc-phase is nearly the only observed for Pd content higher than 27%, while for the Co-richer content both fcc and hcp phases are detected [23,35,47,48]. In addition, thermal and magnetic field annealing can induce in some cases modifications in the crystalline structure [49].…”

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confidence: 99%

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Magnetization reversal in Co‐base nanowire arrays

Vázquez

Vivas

2011

Physica Status Solidi (b)

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The magnetic behaviour of ordered arrays of magnetic nanowires is controlled by the combined action of anisotropy energy terms determined by geometrical shape, crystalline structure and magnetostriction, as well as by the magnetostatic interactions among them. A number of works have been reported on the role of magnetostatic interaction in arrays of nanowires, sometimes focusing on nanowires with vanishing crystalline and magnetostrictive energy terms. Here, in turn we are interested in Co‐base nanowires whose magnetocrystalline anisotropy plays a very important role. Arrays of Co‐base nanowires offer novel, sometimes unexpected behaviour that is not fully understood. Such results are connected to their magnetocrystalline anisotropy, and to their complex magnetization reversal mode. Arrays of Co and Co‐base nanowires have been fabricated by template‐assisted method, by electroplating into highly ordered self‐assembled pores of nanoporous alumina membranes. Their hcp or fcc crystal structure is confirmed to depend on length of nanowires as well as on the presence of selected elements in the composition. The magnetic behaviour of these arrays has been experimentally investigated as a function of (i) geometry (e.g. diameter and, particularly short length) and (ii) composition (e.g. adding Ni or Pd). A complementary study on its temperature dependence reveals the nature of the dominant anisotropy, while the angular dependence of hysteresis loops (e.g. coercivity and remanence) enables a deeper analysis of the magnetization reversal process. Micromagnetic reversal modes are reviewed and modelling and simulations procedures introduced. Complex rotational mechanisms are concluded to be responsible for the reversal process following micromagnetic modes distinct from those pure classically established. SEM image of an array of Co‐base nanowires.

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confidence: 92%

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confidence: 99%

Magnetization reversal in Co‐base nanowire arrays

Vázquez

Vivas

2011

Physica Status Solidi (b)

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“…The electrodeposition of FTM-Pd alloy nanowires have required extensive study because of the large difference in the values of the standard reduction potentials of Pd 2 + (0.92 V) and Fe 2+ (À0.44 V), Co 2+ (À0.28 V), or Ni 2+ (À0.26 V) ions, which makes difficult the codeposition of alloys of those metals from a single bath (Hu et al, 2006;Xu et al, 2006). However, the use of certain additives, such as ammonia, brings together the standard reduction potentials of these metals by complexing Pd 2+ ions, leading to the formation of (Pd(NH 3 ) 4 ) 2+ complexes, which have a standard reduction potential of 0.0 V .…”

Section: Transition Metal (Ni Fe Co)/palladium-based Alloysmentioning

confidence: 99%

“…Some authors have studied the influence of complexing agents, such as ethylenediamine , glycine (Takata and Sumodjo, 2007), or ammonia in the electrodeposition of Pd and Pd alloy. However, Co-Pd alloy nanowires can also be deposited from noncomplexed electrolytes containing Pd 2+ and Co 2+ ions (Hu et al, 2006).…”

Section: Transition Metal (Ni Fe Co)/palladium-based Alloysmentioning

confidence: 99%

Electrochemical synthesis of magnetic nanowires with controlled geometry and magnetic anisotropy

Prida¹,

Garcı́a²,

Hernando³

et al. 2015

Magnetic Nano- And Microwires

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“…Among magnetic nanowires, magnetic and nonmagnetic Co based alloys have been more interested because of its uniaxial crystal structure. There have been numerous reports studying the microstructures and magnetic properties of Co based alloys such as CoFe [12], CoNi [13], CoCu [14], CoPt [15,16], CoPd [17,18], CoPb [19,20] and CoZn [21,22]. In the present work in a constant electrolyte, CoZn nanowires with various Zn contents were synthesized by varying the off time between pulses of the ac pulse electrodeposition voltage.…”

Section: Iranmentioning

confidence: 99%