Metallic cobalt microcrystals with flowerlike architectures: Synthesis, growth mechanism and magnetic properties

Wang, Run-Han; Jiang, Ji-Sen; Hu, Ming

doi:10.1016/j.materresbull.2009.02.016

Cited by 27 publications

(11 citation statements)

References 42 publications

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“…Several recent publications have reported on magnetic systems with three, four or even eight magnetization states in a variety of nanostructures. 13,[15][16][17][18] However, distinguishing between these different states is normally not so easy, since the magnetization cannot be measured for the complete structure but has to be detected at several distinct spatial positions, what strongly enhances the experimental demands. One possibility to overcome this problem is breaking the symmetry of, e.g., a system of coupled rings, by coating some parts of them.…”

Section: Introductionmentioning

confidence: 99%

Fourfold nanosystems for quaternary storage devices

Błachowicz

Ehrmann

2011

Journal of Applied Physics

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In nano-magnetic coupled systems of wires, pronounced magnetization steps in the hysteresis loops have been found by micromagnetic simulations. The steps can be attributed to stable intermediate states, similar to flux-closed vortex states in ferromagnetic nano-rings. Due to the fourfold anisotropy of the system of four crossed nanowires, these states can be distinguished even by measuring the magnetization of the whole system, giving rise to four separated states without application of external magnetic field. Opposite to actual trials with nano-rings or layered structures, no additional method of symmetry breaking is necessary. Such an easily created system can be utilized, e.g., in quaternary (four states, i.e., two bits per magnetic nano-object) magnetic storage applications.

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Section: Introductionmentioning

confidence: 99%

Fourfold nanosystems for quaternary storage devices

Błachowicz

Ehrmann

2011

Journal of Applied Physics

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“…The diffraction pattern of the Cocoated BT in Fig. 1 It is worth noting that the relative intensity of the peaks corresponding to the (0 0 2)/(1 0 1), (0 0 2)/(1 1 0) planes are higher than the standard values in JCPDS card, indicating that the deposited Co may have preferential crystal growth [20]. The cobalt phase possesses a crystalline rather than an amorphous structure which was found in Co-P electroless plating coating [21].…”

Section: Structure and Morphology Analysismentioning

confidence: 97%

Cobalt-coated barium titanate particles: Preparation, characterization and microwave properties

Wang

Liu

et al. 2010

Journal of Alloys and Compounds

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“…In this way, data storage density could be increased by increasing the number of bits per particle instead of increasing the particle density. This approach has also been followed by other groups, resulting in three, four, or up to eight magnetization states in diverse nanostructures [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Distance between Nanoparticles in Clusters on the Magnetization Reversal Process

Ehrmann

Błachowicz

2017

Journal of Nanomaterials

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Fourfold magnetic nanoparticles, created from nanowires or in the form of an open square, offer the possibility of creating quaternary memory devices with four unambiguously distinguishable stable states at remanence. This feature, however, has been simulated for single magnetic nanoparticles or clusters with interparticle distances similar to the nanoparticle dimensions. For the possible use in bit-patterned media, it is important to understand the scaling behavior of the stability of the additional intermediate states with the interparticle distance. The paper investigates exemplarily nanoparticles of two shapes which were found to be optimum to gain four states at remanence. For clusters of these particles, the probability of reaching the additional intermediate states in all particles in the same field region is strongly reduced with decreased interparticle distance. The differences between both shapes indicate possible solutions for this problem in the form of new nanoparticle shapes.

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Metallic cobalt microcrystals with flowerlike architectures: Synthesis, growth mechanism and magnetic properties

Cited by 27 publications

References 42 publications

Fourfold nanosystems for quaternary storage devices

Fourfold nanosystems for quaternary storage devices

Cobalt-coated barium titanate particles: Preparation, characterization and microwave properties

Influence of the Distance between Nanoparticles in Clusters on the Magnetization Reversal Process

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