Planar Hall ring sensor for ultra-low magnetic moment sensing

Hung, Tran Quang; Terki, F.; Kamara, Souleymanne; Kim, Kun-Woo; Charar, S.; Kim, CheolGi

doi:10.1063/1.4918534

Cited by 26 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, we decomposed noise source components of different planar-Hall magnetoresistive (PHMR) sensors in order to address their high thermal stability and low temperature drift characteristics [ 17 ]. Earlier studies reveal that because of their field-dependent sensitivity improvement [ 37 ] and unique self-balanced noise compensating feature [ 21 ], PHMR sensors exhibit several advantages as compared with other MR sensors [ 39 , 40 , 41 ]. Moreover, these unique features favor improving the sensor detection limit in a low-frequency regime.…”

Section: Introductionmentioning

confidence: 99%

Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments

Jeon

Das

Kim

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

The resolution of planar-Hall magnetoresistive (PHMR) sensors was investigated in the frequency range from 0.5 Hz to 200 Hz in terms of its sensitivity, average noise level, and detectivity. Analysis of the sensor sensitivity and voltage noise response was performed by varying operational parameters such as sensor geometrical architectures, sensor configurations, sensing currents, and temperature. All the measurements of PHMR sensors were carried out under both constant current (CC) and constant voltage (CV) modes. In the present study, Barkhausen noise was revealed in 1/f noise component and found less significant in the PHMR sensor configuration. Under measured noise spectral density at optimized conditions, the best magnetic field detectivity was achieved better than 550 pT/√Hz at 100 Hz and close to 1.1 nT/√Hz at 10 Hz for a tri-layer multi-ring PHMR sensor in an unshielded environment. Furthermore, the promising feasibility and possible routes for further improvement of the sensor resolution are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments

Jeon

Das

Kim

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…As well, several inspired magnetic reception techniques have been proposed in recent works [23]. The advantages of magnetic sensors based on the planar Hall effect (PHE) or planar Hall resistance (PHR) are linearity [24], high signal-to-noise ratio [25], and low thermal drift [26]. As well, the element of a PHR sensor contains fewer layers as compared with the element for a GMR [1] or TMR [27] sensor, which additionally simplifies the fabrication procedure of PHR-based biosensors and reduces their cost.…”

Section: Introductionmentioning

confidence: 99%

Performance Validation of a Planar Hall Resistance Biosensor through Beta-Amyloid Biomarker

SungJoon

Torati

Таланцев

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

Magnetic sensors have great potential for biomedical applications, particularly, detection of magnetically-labeled biomolecules and cells. On the basis of the advantage of the planar Hall effect sensor, which consists of improved thermal stability as compared with other magnetic sensors, we have designed a portable biosensor platform that can detect magnetic labels without applying any external magnetic field. The trilayer sensor, with a composition of Ta (5 nm)/NiFe (10 nm)/Cu (x = 0 nm~1.2 nm)/IrMn (10 nm)/Ta (5 nm), was deposited on a silicon wafer using photolithography and a sputtering system, where the optimized sensor sensitivity was 6 μV/(Oe∙mA). The detection of the magnetic label was done by comparing the signals obtained in first harmonic AC mode (1f mode) using an external magnetic field and in the second harmonic AC mode (2f mode) with a self-field generated by current passing through the sensor. In addition, a technique for the β-amyloid biomarker-based antibody-antigen sandwich model was demonstrated for the detection of a series of concentrations of magnetic labels using the self-field mode method, where the signal-to-noise ratio (SNR) was high. The generated self-field was enough to detect an immobilized magnetic tag without an additional external magnetic field. Hence, it could be possible to reduce the device size to use the point-of-care testing using a portable circuit system.

show abstract

“…Магнитные структуры ферромагнетик/антиферромагнетик (F/AF) имеют широкое применение в качестве активных слоев в магнитных сенсорах на основе анизотропного магнетосопротивления [1][2][3][4] и планарного эффекта Холла [5][6][7][8][9][10], а также в элементах магниторезистивной памяти на основе спиновых вентилей [11][12][13]. Антиферромагнитный обмен на интерфейсе F/AF [14] в сочетании с намагничиванием области AF вблизи интерфейса полем слоя F [15,16] приводят к смещению центра петли гистерезиса в область отрицательных полей, направленных против направления остаточной намагниченности слоя F [3,4,14].…”

Section: Introductionunclassified

Обменные взаимодействия в гетероструктурах NiFe/Ta/IrMn в условиях дефицита Ta

Моргунов¹,

Таланцев²,

Bakhmet’ev³

et al. 2020

Физика Твердого Тела

View full text Add to dashboard Cite

In the NiFe/Ta/IrMn structures, the contributions of two types of exchange interactions are separated at the NiFe/IrMn interface, partially separated by non-magnetic Ta fragments. The first “contact” exchange corresponds to the NiFe/IrMn fragments. The second “interlayer” exchange is provided by the Ta conduction electrons in the NiFe/Ta/IrMn fragments. A comparison of the temperature dependences of the exchange bias in heterostructures with varied Ta spacer at fixed parameters of the ferromagnetic layers allowed us to separate the contributions of the above types of exchange interactions and to establish their temperature dependences. The energies of the exchange interactions in the NiFe/IrMn and NiFe/Ta/IrMn fragments were determined.

show abstract

Planar Hall ring sensor for ultra-low magnetic moment sensing

Cited by 26 publications

References 26 publications

Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments

Operational Parameters for Sub-Nano Tesla Field Resolution of PHMR Sensors in Harsh Environments

Performance Validation of a Planar Hall Resistance Biosensor through Beta-Amyloid Biomarker

Обменные взаимодействия в гетероструктурах NiFe/Ta/IrMn в условиях дефицита Ta

Contact Info

Product

Resources

About