TY - JOUR
T1 - Shaping the Magnetic Properties of BaFeO3 Perovskite-Type by Alkaline-Earth Doping
AU - Hong, Nguyen Hoa
AU - Kanoun, Mohammed Benali
AU - Kim, Jang Gun
AU - Atabaev, Timur Sh
AU - Konishi, Kensuke
AU - Noguchi, Satoshi
AU - Kurisu, Makio
AU - Goumri-Said, Souraya
N1 - Funding Information:
The authors would like to thank CSCES-IBS (SNU) for providing facilities for some MPMS measurements. We are grateful to Dr. M.H.P. and J.A. (Univ. of South Florida) for some supplementary VSM measurements. Financial support for this study is acknowledged in the form of an internal grant IRG 16420 (M.B.K.) and IRG 16417 (S.G-S.) from the office of research at Alfaisal University. We also gratefully acknowledge the financial support from EU for the Promotion of International Relations between SNU and EU.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2018/2/8
Y1 - 2018/2/8
N2 - The alkaline-earth iron perovskites AFeO3 are interesting materials since their ferromagnetic domains could be controlled by an applied magnetic field. However, to be exploited for applications, there are still some flaws related to their antiferromagnetic or ferromagnetic behavior at low temperatures. In our work, we have attempted to synthesize pristine BaFeO3 with Ba to partially or fully substitute Sr or Ca in order to tailor the magnetic properties of the host compound as expected for applications. We found that powders of (Ca/Sr/Ba) FeO3 showed an increased enhancement of magnetic properties in comparison to BaFeO3 films. In particular, the (Ca/Sr)0.5Ba0.5FeO3 nanopowders have demonstrated a Curie temperature well above room temperature along with an increased magnetic moment. A considerable coercivity is also surprisingly obtained as a typical signature for a hard magnetic material. First-principles calculations were performed to get an insight into the Ca/Sr influence on the lattice structure, and oxygen vacancies behavior of BaxCa(Sr)1-xFeO3. It was found that doping can lead to an increase of the magnetic moment per Fe atom. However, Ca/Sr-site substitution at the Ba-site of the perovskite exhibits an increasing of magnetic moment per Fe when O vacancies are introduced. This current study shows a new way to exploit this revisited-type of orthoferrites for spintronic applications.
AB - The alkaline-earth iron perovskites AFeO3 are interesting materials since their ferromagnetic domains could be controlled by an applied magnetic field. However, to be exploited for applications, there are still some flaws related to their antiferromagnetic or ferromagnetic behavior at low temperatures. In our work, we have attempted to synthesize pristine BaFeO3 with Ba to partially or fully substitute Sr or Ca in order to tailor the magnetic properties of the host compound as expected for applications. We found that powders of (Ca/Sr/Ba) FeO3 showed an increased enhancement of magnetic properties in comparison to BaFeO3 films. In particular, the (Ca/Sr)0.5Ba0.5FeO3 nanopowders have demonstrated a Curie temperature well above room temperature along with an increased magnetic moment. A considerable coercivity is also surprisingly obtained as a typical signature for a hard magnetic material. First-principles calculations were performed to get an insight into the Ca/Sr influence on the lattice structure, and oxygen vacancies behavior of BaxCa(Sr)1-xFeO3. It was found that doping can lead to an increase of the magnetic moment per Fe atom. However, Ca/Sr-site substitution at the Ba-site of the perovskite exhibits an increasing of magnetic moment per Fe when O vacancies are introduced. This current study shows a new way to exploit this revisited-type of orthoferrites for spintronic applications.
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U2 - 10.1021/acs.jpcc.7b10127
DO - 10.1021/acs.jpcc.7b10127
M3 - Article
AN - SCOPUS:85042157500
VL - 122
SP - 2983
EP - 2989
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 5
ER -