scholarly journals Investigation of possible half-metallic antiferromagnets on double perovskites LaABB′O6 (A=Ca,Sr,Ba; B,B′=transition elements)

2010 ◽  
Vol 108 (9) ◽  
pp. 093908 ◽  
Author(s):  
S. H. Chen ◽  
Z. R. Xiao ◽  
Y. P. Liu ◽  
Y. K. Wang
Keyword(s):  
Double Perovskites ◽  
Transition Elements ◽  
Half Metallic

Investigation of Possible Half-Metallic Antiferromagnets on Double Perovskites A2BB′O6 (A=Ca, Sr Ba; B,B′=Transition Metal Elements)

2013 ◽  
Vol 13 (2) ◽  
pp. 526-539 ◽  
Author(s):  
S. H. Chen ◽  
Z. R. Xiao ◽  
Y. P. Liu ◽  
Y. K. Wang
Keyword(s):  
Transition Metal ◽  
Double Exchange ◽  
Correlation Effect ◽  
Orbit Coupling ◽  
Experimental Confirmation ◽  
Double Perovskites ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Transition Elements ◽  
Half Metallic

AbstractA search was made for possible half-metallic (HM) antiferromagnet (AFM) in all the double perovskites structures of Sr2BB'O6 where BB' pairs are any combination of 3d, 4d or 5d transition elements with the exception of La. Sr can also be replaced by Ca or Ba whenever HM-AFM was found and similar calculations were then performed in order to probe further possibilities. It was found that A2MoOsO6, A2TcReO6, A2CrRuO6, where A=Ca, Sr, Ba, are all potential candidates for HM-AFM. The AFM of A2BB'O6 comes from both the superexchange mechanism and the generalized double exchange mechanism via the B(t2g)-O2pπ-B'(t2g) coupling, With the latter also being the origin of their HM. Also considered were the effects of spin-orbit coupling (SOC) and correlation (+U) by introducing +SOC and +U corrections. It is found that the SOC effect has much less influence than the correlation effect on the HM property of the compounds. For A2TcReO6 and A2CrRuO6, after +U, they become nearly Mott-Insulators. In the future, it is hoped that there will be further experimental confirmation for these possible HM-AFM candidates.

Huge magneto-optical effects in half-metallic double perovskites

2004 ◽  
Vol 70 (18) ◽  
Author(s):  
R. Vidya ◽  
P. Ravindran ◽  
A. Kjekshus ◽  
H. Fjellvåg
Keyword(s):  
Double Perovskites ◽  
Half Metallic ◽  
Optical Effects

scholarly journals Inter-grain tunnelling in the half-metallic double-perovskites Sr2BB'O6(BB'= FeMo, FeRe, CrMo, CrW, CrRe)

2014 ◽  
Vol 75 ◽  
pp. 01001 ◽  
Author(s):  
B. Fisher ◽  
J. Genossar ◽  
K. B. Chashka ◽  
L. Patlagan ◽  
G. M. Reisner
Keyword(s):  
Double Perovskites ◽  
Half Metallic

scholarly journals Electronic structure of half-metallic double perovskites

2003 ◽  
Vol 68 (10) ◽  
Author(s):  
Z. Szotek ◽  
W. M. Temmerman ◽  
A. Svane ◽  
L. Petit ◽  
H. Winter
Keyword(s):  
Electronic Structure ◽  
Double Perovskites ◽  
Half Metallic

Room temperature half metallic ferromagnetism due to Os/Ir(5d) in double perovskites

2022 ◽  
Vol 896 ◽  
pp. 163130
Author(s):  
Qasim Mahmood ◽  
Ghazanfar Nazir ◽  
Sonia Bouzgarrou ◽  
M.S. Rashid ◽  
Eman Algrafy ◽  
...  
Keyword(s):  
Room Temperature ◽  
Double Perovskites ◽  
Half Metallic ◽  
Metallic Ferromagnetism ◽  
Half Metallic Ferromagnetism

scholarly journals Theory of half-metallic double perovskites. II. Effective spin Hamiltonian and disorder effects

2013 ◽  
Vol 87 (16) ◽  
Author(s):  
Onur Erten ◽  
O. Nganba Meetei ◽  
Anamitra Mukherjee ◽  
Mohit Randeria ◽  
Nandini Trivedi ◽  
...  
Keyword(s):  
Double Perovskites ◽  
Spin Hamiltonian ◽  
Effective Spin ◽  
Half Metallic ◽  
Disorder Effects

scholarly journals Prediction of room-temperature half-metallicity in layered halide double perovskites

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Jian Xu ◽  
Changsong Xu ◽  
Jian-Bo Liu ◽  
Laurent Bellaiche ◽  
Hongjun Xiang ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Efficiency ◽  
Double Perovskites ◽  
Nanoscale Device ◽  
Half Metallicity ◽  
Thermal Stabilities ◽  
Half Metallic ◽  
Large Bulk ◽  
Device Applications ◽  
Ferromagnetic Ordering

AbstractHalf-metallic ferromagnets (HMFs) that possess intriguing physical properties with completely spin-polarized current are key candidates for high-efficiency spintronic devices. However, HMFs that could simultaneously have high Curie temperature (Tc), wide half-metallic gap (ΔHM), and large bulk magnetocrystalline anisotropy energy (MAE) are very rare, which significantly restrict their room-temperature (RT) applications. In this article, through materials screening in layered halide double perovskites (LHDPs), we have theoretically identified that Cs4FePb2Cl12, which has good crystallographic, dynamic and thermal stabilities, possesses an intrinsic half-metallic ground-state with a high Tc ~ 450 K. Interestingly, the long-range ferromagnetic ordering in bulk Cs4FePb2Cl12 is contributed by the strong super-superexchange interactions between the neighboring Fe d orbitals mediated by different anionic Cl p orbitals. The high Tc of layered Cs4FePb2Cl12 can be well maintained even in the monolayer limitation, i.e., Tc ~ 370 K for Cs4FePb2Cl12 monolayer, which is critical for nanoscale device applications. Moreover, both bulk and monolayer Cs4FePb2Cl12 can exhibit wide ΔHM ~ 0.55 eV and large MAE >320 μeV/Fe, comparable to that of the best HMFs reported in the literature. Our findings can significantly extend the potentials of LHDPs for high-temperature spintronic applications.

Properties of half metallic (Ba0.8Sr0.2)2−xLa2x/3#x/3FeMoO6 double perovskites

2005 ◽  
Vol 290-291 ◽  
pp. 1021-1024 ◽  
Author(s):  
D. Serrate ◽  
J.M. De Teresa ◽  
J. Blasco ◽  
L. Morellon ◽  
M.R. Ibarra
Keyword(s):  
Double Perovskites ◽  
Half Metallic
Sign in / Sign up

Export Citation Format

Share Document