Pinned orbital moments in uncompensated antiferromagnetic Co doped ZnO

Martin Buchner; Bastian Henne; Verena Ney; Julia Lumetzberger; Fabrice Wilhelm; Andrei Rogalev; Amir Hen; Andreas Ney

doi:10.1063/1.5023898

Pinned orbital moments in uncompensated antiferromagnetic Co doped ZnO

Martin Buchner, Bastian Henne, Verena Ney, Julia Lumetzberger, Fabrice Wilhelm, Andrei Rogalev, Amir Hen, Andreas Ney

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

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Abstract

Low temperature Co K-edge x-ray magnetic circular dichroism spectra at different field cooling conditions were recorded to study the imprinted magnetization in antiferromagnetic (AFM) Co doped ZnO (Co:ZnO) films which manifests itself in a vertical exchange bias effect. Co:ZnO films with 50% and 60% doping concentrations were investigated to provide a high degree of pinned magnetic moments. The measurements reveal a change at the main absorption energy of the spectra, while the signal obtained at the pre-edge stays unaffected by the cooling conditions. Therefore, the pinned uncompensated AFM moments, resulting in an imprinted magnetization, are predominantly of orbital character and are independent of ferromagnetic layers.

Original language	English
Article number	203905
Journal	Journal of Applied Physics
Volume	123
Issue number	20
DOIs	https://doi.org/10.1063/1.5023898
State	Published - 28 May 2018
Externally published	Yes

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abstract = "Low temperature Co K-edge x-ray magnetic circular dichroism spectra at different field cooling conditions were recorded to study the imprinted magnetization in antiferromagnetic (AFM) Co doped ZnO (Co:ZnO) films which manifests itself in a vertical exchange bias effect. Co:ZnO films with 50% and 60% doping concentrations were investigated to provide a high degree of pinned magnetic moments. The measurements reveal a change at the main absorption energy of the spectra, while the signal obtained at the pre-edge stays unaffected by the cooling conditions. Therefore, the pinned uncompensated AFM moments, resulting in an imprinted magnetization, are predominantly of orbital character and are independent of ferromagnetic layers.",

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AU - Buchner, Martin

AU - Henne, Bastian

AU - Ney, Verena

AU - Lumetzberger, Julia

AU - Wilhelm, Fabrice

AU - Rogalev, Andrei

AU - Hen, Amir

AU - Ney, Andreas

PY - 2018/5/28

Y1 - 2018/5/28

N2 - Low temperature Co K-edge x-ray magnetic circular dichroism spectra at different field cooling conditions were recorded to study the imprinted magnetization in antiferromagnetic (AFM) Co doped ZnO (Co:ZnO) films which manifests itself in a vertical exchange bias effect. Co:ZnO films with 50% and 60% doping concentrations were investigated to provide a high degree of pinned magnetic moments. The measurements reveal a change at the main absorption energy of the spectra, while the signal obtained at the pre-edge stays unaffected by the cooling conditions. Therefore, the pinned uncompensated AFM moments, resulting in an imprinted magnetization, are predominantly of orbital character and are independent of ferromagnetic layers.

AB - Low temperature Co K-edge x-ray magnetic circular dichroism spectra at different field cooling conditions were recorded to study the imprinted magnetization in antiferromagnetic (AFM) Co doped ZnO (Co:ZnO) films which manifests itself in a vertical exchange bias effect. Co:ZnO films with 50% and 60% doping concentrations were investigated to provide a high degree of pinned magnetic moments. The measurements reveal a change at the main absorption energy of the spectra, while the signal obtained at the pre-edge stays unaffected by the cooling conditions. Therefore, the pinned uncompensated AFM moments, resulting in an imprinted magnetization, are predominantly of orbital character and are independent of ferromagnetic layers.

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Pinned orbital moments in uncompensated antiferromagnetic Co doped ZnO

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