Thickness-dependent magnetization reversal in CoZrNb amorphous films

Li, X.W.; Song, Cheng; Yang, Jun; Zeng, Fei; Geng, Kuiwei; Pan, Feng

doi:10.1016/j.jmmm.2007.03.196

Journal of Magnetism and Magnetic Materials

2007

DOI: 10.1016/j.jmmm.2007.03.196

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Thickness-dependent magnetization reversal in CoZrNb amorphous films

X.W. Li

Cheng Song

Jun Yang

et al.

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Cited by 13 publications

(1 citation statement)

References 26 publications

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“…[25][26][27][28][29] It is an ideal MFC material for solid-state magnetic sensors. 30,31 Following previous studies, 32,33 we deposited a CoZrNb amorphous thin film using a 99.95%-purity sputtering target. To optimize its growth condition, we first deposited a CoZrNb film on oxidized silicon wafers and measured its magnetic properties using vibrating sample magnetometry (VSM).…”

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confidence: 99%

PicoTesla magnetic tunneling junction sensors integrated with double staged magnetic flux concentrators

Zhang

Qian

et al. 2018

Applied Physics Letters

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Ultra-sensitive solid-state magnetic sensors are in strong demand in many applications where currently available sensors are inadequate. We have used high performance magnetic tunneling junction (MTJ) sensors and pushed the magnetic sensing limit to a high level. We have incorporated double-staged magnetic flux concentrators, one on the MTJ chip level and the other on a more macroscopic level, to amplify the external field of interest. With this approach and undergoing a process of optimization on the flux concentrators, we have increased the sensitivity of the MTJ sensor by a large factor of 517 to 775.4%/Oe in terms of magnetoresistance response. The coercivity of the sensor is only 0.12 Oe. We have achieved a detectable field limit of 30 pT/Hz at 10 kHz. We have presented the noise spectrum and the sensitivity spectrum up to a maximum frequency of 100 kHz.

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mentioning

confidence: 99%

PicoTesla magnetic tunneling junction sensors integrated with double staged magnetic flux concentrators

Zhang

Qian

et al. 2018

Applied Physics Letters

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Soft magnetic properties of amorphous-CoZr/ polycrystalline-M (M = Cu, Ag, Al, Cr) multilayers

Song

Zong

et al. 2007

Appl. Phys. A

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Composition design and properties of CoNbZr amorphous films deposited by unbalanced magnetron sputtering

Guang-wei

Tang

Wang

et al. 2009

J. Cent. South Univ. Technol.

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amorphous films were deposited on noncrystalline glass substrates by DC unbalanced magnetron sputtering. The compositions of amorphous films were tailored in the light of the individual deposition rate of Co, Nb and Zr. The amorphous films with the anticipated composition were prepared by means of co-sputtering Co, Nb and Zr targets simultaneously. It is indicated that there is interaction among three targets during co-sputtering. The morphology and composition of the films were observed by SEM, AFM and EDS. The structure and magnetic property were measured by XRD and physical property measurement system (PPMS). The coercivity changes with the composition, varying from 240 to 1 600 A/m. After vacuum isothermal annealing at temperatures of 475, 500, 525 and 550 ℃ for 15 and 30 min, respectively, it is found that high Nb content is beneficial to improving thermal stability of amorphous films. The crystallized films have the mean grain size of 2−19 nm.

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Thickness-dependent magnetization reversal in CoZrNb amorphous films

Cited by 13 publications

References 26 publications

PicoTesla magnetic tunneling junction sensors integrated with double staged magnetic flux concentrators

PicoTesla magnetic tunneling junction sensors integrated with double staged magnetic flux concentrators

Soft magnetic properties of amorphous-CoZr/ polycrystalline-M (M = Cu, Ag, Al, Cr) multilayers

Composition design and properties of CoNbZr amorphous films deposited by unbalanced magnetron sputtering

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