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G-type antiferromagnetism of Mn ions in A-site-ordered perovskite LaMn3Rh4O12 and La0.8Ca0.2Mn3Rh4O12.
- Source :
-
Physics Letters A . May2021, Vol. 397, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • We synthesized A-site-ordered perovskites LaMn 3 Rh 4 O 12 and La 0.8 Ca 0.2 Mn 3 Rh 4 O 12 by using high-pressure and high temperature method. • Both LaMn 3 Rh 4 O 12 and La 0.8 Ca 0.2 Mn 3 Rh 4 O 12 show antiferromagnetic semiconducting behavior. • The interaction between high spin Mn3+ ions induces a G-type antiferromagnetism, while low spin Rh3+ ions have no magnetic contribution. • The results confirm that non-Jahn-Teller distorted Mn4+ ion cannot occupy A' site in the A-site-ordered perovskite, even partly. A-site-ordered perovskites LaMn 3 Rh 4 O 12 and La 0.8 Ca 0.2 Mn 3 Rh 4 O 12 were prepared by using high-pressure and high temperature method. Structural and BVS analyses suggest that the valence states of Mn and Rh ions are both +3 in LaMn 3 Rh 4 O 12. Partial Ca-doping introduced some Mn4+ ions, which are transferred to B site and leave some deficiencies at A′ site. Localized electrons of Mn and Rh ions induce a semiconducting behavior. Combined with the results of the first principles calculation, it is believed that the interaction between high spin Mn3+ ions induce a G-type antiferromagnetism, while low spin Rh3+ ions have no magnetic contribution. And also, there is no interaction between Mn and Rh ions. The results confirm that non-Jahn-Teller distorted Mn4+ ion cannot occupy A′ site in the A-site-ordered perovskite, even partly. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ANTIFERROMAGNETISM
*PEROVSKITE
*IONS
*HIGH temperatures
*ELECTRONS
Subjects
Details
- Language :
- English
- ISSN :
- 03759601
- Volume :
- 397
- Database :
- Academic Search Index
- Journal :
- Physics Letters A
- Publication Type :
- Academic Journal
- Accession number :
- 149415944
- Full Text :
- https://doi.org/10.1016/j.physleta.2021.127258