Exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy with in-plane/out-of-plane sensing capabilities

J.M. Teixeira; J. Ventura; M.P. Fernandez-Garcia; J.P. Araujo; J.B. Sousa; P. Wisniowski; D.C. Leitao; P.P. Freitas

doi:10.1063/1.3693585

Exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy with in-plane/out-of-plane sensing capabilities

J.M. Teixeira
, J. Ventura
, M.P. Fernandez-Garcia
, J.P. Araujo
, J.B. Sousa
, P. Wisniowski
, D.C. Leitao
, P.P. Freitas

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

16 Citaten (Scopus)

Samenvatting

We investigate the transport properties of exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy of the CoFeB free layer. Angular dependent measurements of the tunnel conductance (varying the applied magnetic field from the in-plane to the out-of-plane direction) show linear and hysteresis-free switching under low applied magnetic fields, demonstrating a new concept for a reversible in-plane/out-of-plane magnetoresistive sensor. State-of-the-art sensitivities were achieved, and a value of 0.4 TMR/Oe is observed in the direction perpendicular to the tunnel junction plane. An analysis of the anisotropy energies at play is performed based on a Stoner - Wohlfarth like model.

Originele taal-2	Engels
Artikelnummer	053930
Aantal pagina's	4
Tijdschrift	Journal of Applied Physics
Volume	111
Nummer van het tijdschrift	5
DOI's	https://doi.org/10.1063/1.3693585
Status	Gepubliceerd - 1 mrt. 2012
Extern gepubliceerd	Ja

Financiering

Work supported by Grant Nos. FEDER-POCTI/0155, PTDC/CTM- NAN/112672/2009. Funding from FCT through the Associated Laboratory-IN is acknowledged. J.M.T., D.C.L., and M.P.F.G. are thankful for FCT (SFRH/BPD/72329/2010 and SFRH/BPD/72359/2010) and Principado de Asturias (POST10-31) grants, respectively. J.V. and P.W. acknowledge financial support of FSE/POPH and the Polish Ministry of Science and Higher Education STT NN 515544538, respectively.

Toegang tot document

10.1063/1.3693585

Andere bestanden en links

Link naar publicatie in Scopus

Citeer dit

@article{6360dd177bcf44a99f5a4d4854a05ec3,

title = "Exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy with in-plane/out-of-plane sensing capabilities",

abstract = "We investigate the transport properties of exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy of the CoFeB free layer. Angular dependent measurements of the tunnel conductance (varying the applied magnetic field from the in-plane to the out-of-plane direction) show linear and hysteresis-free switching under low applied magnetic fields, demonstrating a new concept for a reversible in-plane/out-of-plane magnetoresistive sensor. State-of-the-art sensitivities were achieved, and a value of 0.4 TMR/Oe is observed in the direction perpendicular to the tunnel junction plane. An analysis of the anisotropy energies at play is performed based on a Stoner - Wohlfarth like model.",

author = "J.M. Teixeira and J. Ventura and M.P. Fernandez-Garcia and J.P. Araujo and J.B. Sousa and P. Wisniowski and D.C. Leitao and P.P. Freitas",

year = "2012",

month = mar,

day = "1",

doi = "10.1063/1.3693585",

language = "English",

volume = "111",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "5",

}

TY - JOUR

T1 - Exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy with in-plane/out-of-plane sensing capabilities

AU - Teixeira, J.M.

AU - Ventura, J.

AU - Fernandez-Garcia, M.P.

AU - Araujo, J.P.

AU - Sousa, J.B.

AU - Wisniowski, P.

AU - Leitao, D.C.

AU - Freitas, P.P.

PY - 2012/3/1

Y1 - 2012/3/1

N2 - We investigate the transport properties of exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy of the CoFeB free layer. Angular dependent measurements of the tunnel conductance (varying the applied magnetic field from the in-plane to the out-of-plane direction) show linear and hysteresis-free switching under low applied magnetic fields, demonstrating a new concept for a reversible in-plane/out-of-plane magnetoresistive sensor. State-of-the-art sensitivities were achieved, and a value of 0.4 TMR/Oe is observed in the direction perpendicular to the tunnel junction plane. An analysis of the anisotropy energies at play is performed based on a Stoner - Wohlfarth like model.

AB - We investigate the transport properties of exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy of the CoFeB free layer. Angular dependent measurements of the tunnel conductance (varying the applied magnetic field from the in-plane to the out-of-plane direction) show linear and hysteresis-free switching under low applied magnetic fields, demonstrating a new concept for a reversible in-plane/out-of-plane magnetoresistive sensor. State-of-the-art sensitivities were achieved, and a value of 0.4 TMR/Oe is observed in the direction perpendicular to the tunnel junction plane. An analysis of the anisotropy energies at play is performed based on a Stoner - Wohlfarth like model.

UR - https://www.scopus.com/pages/publications/84858974183

U2 - 10.1063/1.3693585

DO - 10.1063/1.3693585

M3 - Article

SN - 0021-8979

VL - 111

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 5

M1 - 053930

ER -

Exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy with in-plane/out-of-plane sensing capabilities

Samenvatting

Financiering

Toegang tot document

Andere bestanden en links

Vingerafdruk

Citeer dit