Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling

B. Y. Wang; N. Y. Jih; W. C. Lin; C. H. Chuang; P. J. Hsu; C. W. Peng; Y. C. Yeh; Y. L. Chan; D. H. Wei; W. C. Chiang; Minn Tsong Lin

doi:10.1103/PhysRevB.83.104417

Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling

B. Y. Wang, N. Y. Jih, W. C. Lin, C. H. Chuang, P. J. Hsu, C. W. Peng, Y. C. Yeh, Y. L. Chan, D. H. Wei, W. C. Chiang, Minn Tsong Lin

Department of Physics

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

29 Citations (Scopus)

Abstract

Using x-ray photoemission electron microscopy and the magneto-optical Kerr effect, we have demonstrated a perpendicular magnetic anisotropy that could be due to exchange coupling between the ferromagnetic and antiferromagnetic layers. The results of magnetic imaging and hysteresis loops show that the magnetization of Fe and permalloy (Py) films orients from the in-plane to perpendicular direction, as an Mn underlayer is above a threshold value that depends on the Fe or Py layer thickness. Their thickness-dependent behaviors can be quantitatively described by a phenomenological model that takes into account the finite-size effect of the antiferromagnet on exchange coupling. The anisotropy energy extracted from the model and the thermal stability of perpendicular magnetization enhanced with the increase of the Mn underlayer further demonstrate the exchange coupling nature.

Original language	English
Article number	104417
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.83.104417
Publication status	Published - 2011 Mar 22

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling",

abstract = "Using x-ray photoemission electron microscopy and the magneto-optical Kerr effect, we have demonstrated a perpendicular magnetic anisotropy that could be due to exchange coupling between the ferromagnetic and antiferromagnetic layers. The results of magnetic imaging and hysteresis loops show that the magnetization of Fe and permalloy (Py) films orients from the in-plane to perpendicular direction, as an Mn underlayer is above a threshold value that depends on the Fe or Py layer thickness. Their thickness-dependent behaviors can be quantitatively described by a phenomenological model that takes into account the finite-size effect of the antiferromagnet on exchange coupling. The anisotropy energy extracted from the model and the thermal stability of perpendicular magnetization enhanced with the increase of the Mn underlayer further demonstrate the exchange coupling nature.",

author = "Wang, {B. Y.} and Jih, {N. Y.} and Lin, {W. C.} and Chuang, {C. H.} and Hsu, {P. J.} and Peng, {C. W.} and Yeh, {Y. C.} and Chan, {Y. L.} and Wei, {D. H.} and Chiang, {W. C.} and Lin, {Minn Tsong}",

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Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling. / Wang, B. Y.; Jih, N. Y.; Lin, W. C.; Chuang, C. H.; Hsu, P. J.; Peng, C. W.; Yeh, Y. C.; Chan, Y. L.; Wei, D. H.; Chiang, W. C.; Lin, Minn Tsong.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 10, 104417, 22.03.2011.

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

TY - JOUR

T1 - Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling

AU - Wang, B. Y.

AU - Jih, N. Y.

AU - Lin, W. C.

AU - Chuang, C. H.

AU - Hsu, P. J.

AU - Peng, C. W.

AU - Yeh, Y. C.

AU - Chan, Y. L.

AU - Wei, D. H.

AU - Chiang, W. C.

AU - Lin, Minn Tsong

PY - 2011/3/22

Y1 - 2011/3/22

N2 - Using x-ray photoemission electron microscopy and the magneto-optical Kerr effect, we have demonstrated a perpendicular magnetic anisotropy that could be due to exchange coupling between the ferromagnetic and antiferromagnetic layers. The results of magnetic imaging and hysteresis loops show that the magnetization of Fe and permalloy (Py) films orients from the in-plane to perpendicular direction, as an Mn underlayer is above a threshold value that depends on the Fe or Py layer thickness. Their thickness-dependent behaviors can be quantitatively described by a phenomenological model that takes into account the finite-size effect of the antiferromagnet on exchange coupling. The anisotropy energy extracted from the model and the thermal stability of perpendicular magnetization enhanced with the increase of the Mn underlayer further demonstrate the exchange coupling nature.

AB - Using x-ray photoemission electron microscopy and the magneto-optical Kerr effect, we have demonstrated a perpendicular magnetic anisotropy that could be due to exchange coupling between the ferromagnetic and antiferromagnetic layers. The results of magnetic imaging and hysteresis loops show that the magnetization of Fe and permalloy (Py) films orients from the in-plane to perpendicular direction, as an Mn underlayer is above a threshold value that depends on the Fe or Py layer thickness. Their thickness-dependent behaviors can be quantitatively described by a phenomenological model that takes into account the finite-size effect of the antiferromagnet on exchange coupling. The anisotropy energy extracted from the model and the thermal stability of perpendicular magnetization enhanced with the increase of the Mn underlayer further demonstrate the exchange coupling nature.

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