Controlling the exchange interaction using the spin-flip transition of antiferromagnetic spins in Ni 81 Fe 19 α- Fe 2 O 3

Joonghoe Dho; C. W. Leung; Z. H. Barber; M. G. Blamire

doi:10.1063/1.1846191

Controlling the exchange interaction using the spin-flip transition of antiferromagnetic spins in Ni ₈₁ Fe ₁₉ α- Fe ₂ O ₃

Joonghoe Dho
, C. W. Leung
, Z. H. Barber
, M. G. Blamire

Department of Physics

University of Cambridge

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

6 Scopus citations

Abstract

We have studied exchange bias and coercivity in ferromagnetic (FM) Ni81 Fe19 layers coupled with antiferromagnetic (AF) (0001), (11 2- 0), and (1 1- 02) α- Fe2 O3 layers. We show that the exchange interaction between FM and AF layers is controllable by a magnetic-field annealing (MFA) through a spin reorientation temperature of an AF material, similar to a MFA through a Ǹel temperature in normal exchange-biased systems. For (11 2- 0) and (1 1- 02) α- Fe2 O3, the temperature-dependent exchange bias displayed a sudden increase below a spin-flip temperature of α- Fe2 O3 (Tm) and the coercivity showed a clear variation near Tm.

Original language	English
Article number	10K101
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1846191
State	Published - 15 May 2005

Access to Document

10.1063/1.1846191

Cite this

@article{d866bfd1898b4991a7c9a8f7deeb4188,

title = "Controlling the exchange interaction using the spin-flip transition of antiferromagnetic spins in Ni 81 Fe 19 α- Fe 2 O 3 ",

abstract = "We have studied exchange bias and coercivity in ferromagnetic (FM) Ni81 Fe19 layers coupled with antiferromagnetic (AF) (0001), (11 2- 0), and (1 1- 02) α- Fe2 O3 layers. We show that the exchange interaction between FM and AF layers is controllable by a magnetic-field annealing (MFA) through a spin reorientation temperature of an AF material, similar to a MFA through a Ǹel temperature in normal exchange-biased systems. For (11 2- 0) and (1 1- 02) α- Fe2 O3, the temperature-dependent exchange bias displayed a sudden increase below a spin-flip temperature of α- Fe2 O3 (Tm) and the coercivity showed a clear variation near Tm.",

author = "Joonghoe Dho and Leung, \{C. W.\} and Barber, \{Z. H.\} and Blamire, \{M. G.\}",

year = "2005",

month = may,

day = "15",

doi = "10.1063/1.1846191",

language = "English",

volume = "97",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "10",

}

TY - JOUR

T1 - Controlling the exchange interaction using the spin-flip transition of antiferromagnetic spins in Ni 81 Fe 19 α- Fe 2 O 3

AU - Dho, Joonghoe

AU - Leung, C. W.

AU - Barber, Z. H.

AU - Blamire, M. G.

PY - 2005/5/15

Y1 - 2005/5/15

N2 - We have studied exchange bias and coercivity in ferromagnetic (FM) Ni81 Fe19 layers coupled with antiferromagnetic (AF) (0001), (11 2- 0), and (1 1- 02) α- Fe2 O3 layers. We show that the exchange interaction between FM and AF layers is controllable by a magnetic-field annealing (MFA) through a spin reorientation temperature of an AF material, similar to a MFA through a Ǹel temperature in normal exchange-biased systems. For (11 2- 0) and (1 1- 02) α- Fe2 O3, the temperature-dependent exchange bias displayed a sudden increase below a spin-flip temperature of α- Fe2 O3 (Tm) and the coercivity showed a clear variation near Tm.

AB - We have studied exchange bias and coercivity in ferromagnetic (FM) Ni81 Fe19 layers coupled with antiferromagnetic (AF) (0001), (11 2- 0), and (1 1- 02) α- Fe2 O3 layers. We show that the exchange interaction between FM and AF layers is controllable by a magnetic-field annealing (MFA) through a spin reorientation temperature of an AF material, similar to a MFA through a Ǹel temperature in normal exchange-biased systems. For (11 2- 0) and (1 1- 02) α- Fe2 O3, the temperature-dependent exchange bias displayed a sudden increase below a spin-flip temperature of α- Fe2 O3 (Tm) and the coercivity showed a clear variation near Tm.

UR - https://www.scopus.com/pages/publications/20944449634

U2 - 10.1063/1.1846191

DO - 10.1063/1.1846191

M3 - Article

AN - SCOPUS:20944449634

SN - 0021-8979

VL - 97

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 10

M1 - 10K101

ER -

Controlling the exchange interaction using the spin-flip transition of antiferromagnetic spins in Ni ₈₁ Fe ₁₉ α- Fe ₂ O ₃

Abstract

Access to Document

Other files and links

Fingerprint

Cite this