P. M. Vetoshko, A. K. Zvezdin, V. A. Skidanov, I. I. Syvorotka, I. M. Syvorotka, V. I. Belotelov, “The effect of the disk magnetic element profile on the saturation field and noise of a magneto-modulation magnetic field sensor”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2015, Volume 41, Issue 5,Pages <nobr>103

This article is cited in 13 papers

The effect of the disk magnetic element profile on the saturation field and noise of a magneto-modulation magnetic field sensor

P. M. Vetoshko^ab, A. K. Zvezdin^ac, V. A. Skidanov^d, I. I. Syvorotka^e, I. M. Syvorotka^e, V. I. Belotelov^acf

^a Russian Quantum Center, Skolkovo, Moscow
^b Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, Moscow
^c Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
^d Institute for Design Problems in Microelectronics of Russian Academy of Sciences, Moscow
^e Karat Scientific and Production Enterprise, L'vov
^f Lomonosov Moscow State University

Abstract: Using the finite element method, it was shown by simulations that the approximation of a semielliptic thickness profile of magnetic disk by a stepped profile reduces the saturation field. Reducing the saturation field improves the sensitivity of magneto-modulation sensors, which is confirmed by experiments in the measurements of noise using magnetic field sensors that have a core with a stepped profile. The obtained level of magnetic sensor noise with a four-stage-core profile (1.5 $\cdot$ 10$^{-9}$ Oe/Hz$^{1/2}$) is more than an order of magnitude lower than in the known modern counterparts.

Received: 05.12.2014