Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB

N. Wiese; T. Dimopoulos; M. Rührig; J. Wecker; G. Reiss; J. Sort; J. Nogués

doi:10.1209/0295-5075/78/67002

Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB

N. Wiese, T. Dimopoulos, M. Rührig, J. Wecker, G. Reiss, J. Sort, J. Nogués

Departamento de Física

Producción científica: Contribución a una revista › Artículo › Investigación › revisión exhaustiva

11 Citas (Scopus)

Resumen

The temperature dependence of saturation and spin-flop fields for artificial ferrimagnets (AFi) based on antiparallel coupled CoFeB/Ru/CoFeB trilayers has been investigated in a temperature range between 80 K and 600 K. The results presented in this paper are relevant for magnetic devices using this system, e.g. magnetic-random access memory based on spin-flop switching. In good accordance to the theory, the saturation field Hsat behaves like Hsat ∝ H0(T/T0)/sinh(T/T0) with a characteristic temperature of T0 ≈ 150 K. Within this model, the Fermi velocity for the Ru layer is of the order of 105 m/s, therefore, explaining the strong variation of the coupling strength with the temperature in Ru-based AFi. Furthermore, a strong uniaxial anisotropy of Ku ≤ 2 × 103 J/m3 with a small angular distribution of the anisotropy axes is observed for the AFi trilayers based on amorphous CoFeB alloys. © Europhysics Letters Association.

Idioma original	Inglés
Número de artículo	67002
Páginas (desde-hasta)	1-1
Publicación	Europhysics Letters
Volumen	78
N.º	6
DOI	https://doi.org/10.1209/0295-5075/78/67002
Estado	Publicada - 1 jun 2007

Acceder al documento

10.1209/0295-5075/78/67002

Citar esto

@article{41428038713a4e94ae070f6d4a86661f,

title = "Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB",

abstract = "The temperature dependence of saturation and spin-flop fields for artificial ferrimagnets (AFi) based on antiparallel coupled CoFeB/Ru/CoFeB trilayers has been investigated in a temperature range between 80 K and 600 K. The results presented in this paper are relevant for magnetic devices using this system, e.g. magnetic-random access memory based on spin-flop switching. In good accordance to the theory, the saturation field Hsat behaves like Hsat ∝ H0(T/T0)/sinh(T/T0) with a characteristic temperature of T0 ≈ 150 K. Within this model, the Fermi velocity for the Ru layer is of the order of 105 m/s, therefore, explaining the strong variation of the coupling strength with the temperature in Ru-based AFi. Furthermore, a strong uniaxial anisotropy of Ku ≤ 2 × 103 J/m3 with a small angular distribution of the anisotropy axes is observed for the AFi trilayers based on amorphous CoFeB alloys. {\textcopyright} Europhysics Letters Association.",

author = "N. Wiese and T. Dimopoulos and M. R{\"u}hrig and J. Wecker and G. Reiss and J. Sort and J. Nogu{\'e}s",

year = "2007",

month = jun,

day = "1",

doi = "10.1209/0295-5075/78/67002",

language = "English",

volume = "78",

pages = "1--1",

number = "6",

}

TY - JOUR

T1 - Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB

AU - Wiese, N.

AU - Dimopoulos, T.

AU - Rührig, M.

AU - Wecker, J.

AU - Reiss, G.

AU - Sort, J.

AU - Nogués, J.

PY - 2007/6/1

Y1 - 2007/6/1

N2 - The temperature dependence of saturation and spin-flop fields for artificial ferrimagnets (AFi) based on antiparallel coupled CoFeB/Ru/CoFeB trilayers has been investigated in a temperature range between 80 K and 600 K. The results presented in this paper are relevant for magnetic devices using this system, e.g. magnetic-random access memory based on spin-flop switching. In good accordance to the theory, the saturation field Hsat behaves like Hsat ∝ H0(T/T0)/sinh(T/T0) with a characteristic temperature of T0 ≈ 150 K. Within this model, the Fermi velocity for the Ru layer is of the order of 105 m/s, therefore, explaining the strong variation of the coupling strength with the temperature in Ru-based AFi. Furthermore, a strong uniaxial anisotropy of Ku ≤ 2 × 103 J/m3 with a small angular distribution of the anisotropy axes is observed for the AFi trilayers based on amorphous CoFeB alloys. © Europhysics Letters Association.

AB - The temperature dependence of saturation and spin-flop fields for artificial ferrimagnets (AFi) based on antiparallel coupled CoFeB/Ru/CoFeB trilayers has been investigated in a temperature range between 80 K and 600 K. The results presented in this paper are relevant for magnetic devices using this system, e.g. magnetic-random access memory based on spin-flop switching. In good accordance to the theory, the saturation field Hsat behaves like Hsat ∝ H0(T/T0)/sinh(T/T0) with a characteristic temperature of T0 ≈ 150 K. Within this model, the Fermi velocity for the Ru layer is of the order of 105 m/s, therefore, explaining the strong variation of the coupling strength with the temperature in Ru-based AFi. Furthermore, a strong uniaxial anisotropy of Ku ≤ 2 × 103 J/m3 with a small angular distribution of the anisotropy axes is observed for the AFi trilayers based on amorphous CoFeB alloys. © Europhysics Letters Association.

U2 - 10.1209/0295-5075/78/67002

DO - 10.1209/0295-5075/78/67002

M3 - Article

SN - 0295-5075

VL - 78

SP - 1

EP - 1

JO - Europhysics Letters

JF - Europhysics Letters

IS - 6

M1 - 67002

ER -

Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB

Resumen

Acceder al documento

Huella

Citar esto