NiCo sensing layer for enhanced signals in planar hall effect sensors

Jaein Lim; Brajalal Sinha; Torati Sri Ramulu; Kunwoo Kim; Dong Young Kim; Cheolgi Kim

doi:10.1007/s12540-013-4032-4

NiCo sensing layer for enhanced signals in planar hall effect sensors

Jaein Lim, Brajalal Sinha, Torati Sri Ramulu, Kunwoo Kim, Dong Young Kim, Cheolgi Kim

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

NiCo alloy materials have been investigaged as a potential sensing layer for planar Hall effect (PHE) sensors in magnetic multilayer structures. In this study, the magnetoresistive performance of the NiCo alloy is compared with that of the NiFe alloy. With an optimum thickness of 10 nm, the increment of the PHE voltage (V _max ) for the NiCo-based sensor was approximately 1.5 times larger than that of the NiFe-based sensor. The field sensitivity of both sensor types appeared to be nearly equal. However, the dynamic field range for the NiCo sensor was increased by approximately 40% compared with that of the NiFe sensor. The measuring configuration was optimized in order to obtain higher field sensitivity in the sensor. The field sensitivity was measured to be at a maximum at a 20 angle between the easy axis of the sensor and the applied external field, which was approximately three times higher than that in the perpendicular direction.

Original language	English
Pages (from-to)	875-878
Number of pages	4
Journal	Metals and Materials International
Volume	19
Issue number	4
DOIs	https://doi.org/10.1007/s12540-013-4032-4
State	Published - Jul 2013

Bibliographical note

Funding Information:
This research was supported by the World Class University (WCU) program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (grant no. R32-20026).

Keywords

exchange bias field
ferromagnetic alloy
field sensitivity
magnetoresistive sensor
planar hall effect

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title = "NiCo sensing layer for enhanced signals in planar hall effect sensors",

abstract = "NiCo alloy materials have been investigaged as a potential sensing layer for planar Hall effect (PHE) sensors in magnetic multilayer structures. In this study, the magnetoresistive performance of the NiCo alloy is compared with that of the NiFe alloy. With an optimum thickness of 10 nm, the increment of the PHE voltage (V max ) for the NiCo-based sensor was approximately 1.5 times larger than that of the NiFe-based sensor. The field sensitivity of both sensor types appeared to be nearly equal. However, the dynamic field range for the NiCo sensor was increased by approximately 40\% compared with that of the NiFe sensor. The measuring configuration was optimized in order to obtain higher field sensitivity in the sensor. The field sensitivity was measured to be at a maximum at a 20 angle between the easy axis of the sensor and the applied external field, which was approximately three times higher than that in the perpendicular direction.",

keywords = "exchange bias field, ferromagnetic alloy, field sensitivity, magnetoresistive sensor, planar hall effect",

author = "Jaein Lim and Brajalal Sinha and Ramulu, \{Torati Sri\} and Kunwoo Kim and Kim, \{Dong Young\} and Cheolgi Kim",

note = "Funding Information: This research was supported by the World Class University (WCU) program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (grant no. R32-20026).",

year = "2013",

month = jul,

doi = "10.1007/s12540-013-4032-4",

language = "English",

volume = "19",

pages = "875--878",

journal = "Metals and Materials International",

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TY - JOUR

T1 - NiCo sensing layer for enhanced signals in planar hall effect sensors

AU - Lim, Jaein

AU - Sinha, Brajalal

AU - Ramulu, Torati Sri

AU - Kim, Kunwoo

AU - Kim, Dong Young

AU - Kim, Cheolgi

N1 - Funding Information: This research was supported by the World Class University (WCU) program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (grant no. R32-20026).

PY - 2013/7

Y1 - 2013/7

N2 - NiCo alloy materials have been investigaged as a potential sensing layer for planar Hall effect (PHE) sensors in magnetic multilayer structures. In this study, the magnetoresistive performance of the NiCo alloy is compared with that of the NiFe alloy. With an optimum thickness of 10 nm, the increment of the PHE voltage (V max ) for the NiCo-based sensor was approximately 1.5 times larger than that of the NiFe-based sensor. The field sensitivity of both sensor types appeared to be nearly equal. However, the dynamic field range for the NiCo sensor was increased by approximately 40% compared with that of the NiFe sensor. The measuring configuration was optimized in order to obtain higher field sensitivity in the sensor. The field sensitivity was measured to be at a maximum at a 20 angle between the easy axis of the sensor and the applied external field, which was approximately three times higher than that in the perpendicular direction.

AB - NiCo alloy materials have been investigaged as a potential sensing layer for planar Hall effect (PHE) sensors in magnetic multilayer structures. In this study, the magnetoresistive performance of the NiCo alloy is compared with that of the NiFe alloy. With an optimum thickness of 10 nm, the increment of the PHE voltage (V max ) for the NiCo-based sensor was approximately 1.5 times larger than that of the NiFe-based sensor. The field sensitivity of both sensor types appeared to be nearly equal. However, the dynamic field range for the NiCo sensor was increased by approximately 40% compared with that of the NiFe sensor. The measuring configuration was optimized in order to obtain higher field sensitivity in the sensor. The field sensitivity was measured to be at a maximum at a 20 angle between the easy axis of the sensor and the applied external field, which was approximately three times higher than that in the perpendicular direction.

KW - exchange bias field

KW - ferromagnetic alloy

KW - field sensitivity

KW - magnetoresistive sensor

KW - planar hall effect

UR - https://www.scopus.com/pages/publications/84879955831

U2 - 10.1007/s12540-013-4032-4

DO - 10.1007/s12540-013-4032-4

M3 - Article

AN - SCOPUS:84879955831

SN - 1598-9623

VL - 19

SP - 875

EP - 878

JO - Metals and Materials International

JF - Metals and Materials International

IS - 4

ER -

NiCo sensing layer for enhanced signals in planar hall effect sensors

Abstract

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Keywords

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