Role of gallium diffusion in the formation of a magnetically dead layer at the Y3Fe5 O12/Gd3Ga5 O12 epitaxial interface
(2018) In Physical Review Materials 2(10).- Abstract
We have clarified the origin of a magnetically dead interface layer formed in yttrium iron garnet (YIG) films grown at above 700 °C onto a gadolinium gallium garnet (GGG) substrate by means of laser molecular beam epitaxy. The diffusion-assisted formation of a Ga-rich region at the YIG/GGG interface is demonstrated by means of composition depth profiling performed by x-ray photoelectron spectroscopy, secondary ion mass spectroscopy, and x-ray and neutron reflectometry. Our finding is in sharp contrast to the earlier expressed assumption that Gd acts as a migrant element in the YIG/GGG system. We further correlate the presence of a Ga-rich transition layer with considerable quenching of ferromagnetic resonance and spin wave propagation... (More)
We have clarified the origin of a magnetically dead interface layer formed in yttrium iron garnet (YIG) films grown at above 700 °C onto a gadolinium gallium garnet (GGG) substrate by means of laser molecular beam epitaxy. The diffusion-assisted formation of a Ga-rich region at the YIG/GGG interface is demonstrated by means of composition depth profiling performed by x-ray photoelectron spectroscopy, secondary ion mass spectroscopy, and x-ray and neutron reflectometry. Our finding is in sharp contrast to the earlier expressed assumption that Gd acts as a migrant element in the YIG/GGG system. We further correlate the presence of a Ga-rich transition layer with considerable quenching of ferromagnetic resonance and spin wave propagation in thin YIG films. Finally, we clarify the origin of the enigmatic low-density overlayer that is often observed in neutron and x-ray reflectometry studies of the YIG/GGG epitaxial system.
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- author
- publishing date
- 2018-10
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Materials
- volume
- 2
- issue
- 10
- article number
- 104404
- publisher
- American Physical Society
- external identifiers
-
- scopus:85056267369
- ISSN
- 2475-9953
- DOI
- 10.1103/PhysRevMaterials.2.104404
- language
- English
- LU publication?
- no
- id
- 42e33cf3-c922-4454-a3c2-91be32f0f4e3
- date added to LUP
- 2022-04-04 13:08:35
- date last changed
- 2022-04-04 17:01:02
@article{42e33cf3-c922-4454-a3c2-91be32f0f4e3,
abstract = {{<p>We have clarified the origin of a magnetically dead interface layer formed in yttrium iron garnet (YIG) films grown at above 700 °C onto a gadolinium gallium garnet (GGG) substrate by means of laser molecular beam epitaxy. The diffusion-assisted formation of a Ga-rich region at the YIG/GGG interface is demonstrated by means of composition depth profiling performed by x-ray photoelectron spectroscopy, secondary ion mass spectroscopy, and x-ray and neutron reflectometry. Our finding is in sharp contrast to the earlier expressed assumption that Gd acts as a migrant element in the YIG/GGG system. We further correlate the presence of a Ga-rich transition layer with considerable quenching of ferromagnetic resonance and spin wave propagation in thin YIG films. Finally, we clarify the origin of the enigmatic low-density overlayer that is often observed in neutron and x-ray reflectometry studies of the YIG/GGG epitaxial system.</p>}},
author = {{Suturin, S. M. and Korovin, A. M. and Bursian, V. E. and Lutsev, L. V. and Bourobina, V. and Yakovlev, N. L. and Montecchi, M. and Pasquali, L. and Ukleev, V. and Vorobiev, A. and Devishvili, A. and Sokolov, N. S.}},
issn = {{2475-9953}},
language = {{eng}},
number = {{10}},
publisher = {{American Physical Society}},
series = {{Physical Review Materials}},
title = {{Role of gallium diffusion in the formation of a magnetically dead layer at the Y3Fe5 O12/Gd3Ga5 O12 epitaxial interface}},
url = {{http://dx.doi.org/10.1103/PhysRevMaterials.2.104404}},
doi = {{10.1103/PhysRevMaterials.2.104404}},
volume = {{2}},
year = {{2018}},
}