TY  - JOUR
AU  - Wang, Aifeng
AU  - Wu, Lijun
AU  - Ivanovski, Valentin N.
AU  - Warren, J. B.
AU  - Tian, Jianjun
AU  - Zhu, Yimei
AU  - Petrović, Čedomir
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1232
AB  - We report critical current density (J(c)) in tetragonal FeS single crystals, similar to iron-based superconductors with much higher superconducting critical temperatures (T-c). The Jc is enhanced three times by 6% Se doping. We observe scaling of the normalized vortex pinning force as a function of reduced field at all temperatures. Vortex pinning in FeS and FeS0.94Se0.06 shows contribution of core-normal surfacelike pinning. Reduced temperature dependence of J(c) indicates that dominant interaction of vortex cores and pinning centers is via scattering of charge carriers with reduced mean free path (delta l), in contrast to KxFe2-ySe2 where spatial variations in T-c (delta T-c) prevails.
T2  - Physical Review B: Condensed Matter and Materials Physics
T1  - Critical current density and vortex pinning in tetragonal FeS1-xSex (x=0,0.06)
VL  - 94
IS  - 9
DO  - 10.1103/PhysRevB.94.094506
ER  - 

@article{
author = "Wang, Aifeng and Wu, Lijun and Ivanovski, Valentin N. and Warren, J. B. and Tian, Jianjun and Zhu, Yimei and Petrović, Čedomir",
year = "2016",
abstract = "We report critical current density (J(c)) in tetragonal FeS single crystals, similar to iron-based superconductors with much higher superconducting critical temperatures (T-c). The Jc is enhanced three times by 6% Se doping. We observe scaling of the normalized vortex pinning force as a function of reduced field at all temperatures. Vortex pinning in FeS and FeS0.94Se0.06 shows contribution of core-normal surfacelike pinning. Reduced temperature dependence of J(c) indicates that dominant interaction of vortex cores and pinning centers is via scattering of charge carriers with reduced mean free path (delta l), in contrast to KxFe2-ySe2 where spatial variations in T-c (delta T-c) prevails.",
journal = "Physical Review B: Condensed Matter and Materials Physics",
title = "Critical current density and vortex pinning in tetragonal FeS1-xSex (x=0,0.06)",
volume = "94",
number = "9",
doi = "10.1103/PhysRevB.94.094506"
}

Wang, A., Wu, L., Ivanovski, V. N., Warren, J. B., Tian, J., Zhu, Y.,& Petrović, Č.. (2016). Critical current density and vortex pinning in tetragonal FeS1-xSex (x=0,0.06). in Physical Review B: Condensed Matter and Materials Physics, 94(9).
https://doi.org/10.1103/PhysRevB.94.094506

Wang A, Wu L, Ivanovski VN, Warren JB, Tian J, Zhu Y, Petrović Č. Critical current density and vortex pinning in tetragonal FeS1-xSex (x=0,0.06). in Physical Review B: Condensed Matter and Materials Physics. 2016;94(9).
doi:10.1103/PhysRevB.94.094506 .

Wang, Aifeng, Wu, Lijun, Ivanovski, Valentin N., Warren, J. B., Tian, Jianjun, Zhu, Yimei, Petrović, Čedomir, "Critical current density and vortex pinning in tetragonal FeS1-xSex (x=0,0.06)" in Physical Review B: Condensed Matter and Materials Physics, 94, no. 9 (2016),
https://doi.org/10.1103/PhysRevB.94.094506 . .

TY  - JOUR
AU  - Lei, Hechang
AU  - Ryu, Hyejin
AU  - Ivanovski, Valentin N.
AU  - Warren, J. B.
AU  - Frenkel, A. I.
AU  - Cekić, Božidar Đ.
AU  - Yin, Wei-Guo
AU  - Petrović, Čedomir
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5176
AB  - We have successfully synthesized a layered iron oxychalcogenide BaFe2Se2O single crystal. This compound is built up of Ba and Fe-Se(O) layers alternatively stacked along the c axis. The Fe-Se(O) layers contain double chains of edge-shared Fe-Se(O) tetrahedra that propagate along the b axis and are bridged by oxygen along the a axis. Physical property measurements indicate that BaFe2Se2O is a semiconductor without the Curie-Weiss behavior up to 350 K. There is a possible long-range antiferromagnetic transition at 240 K, corresponding to the peak in specific-heat measurement, and two transitions at 115 K and 43 K where magnetic susceptibility drops abruptly. The magnetic entropy up to 300 K is much smaller than the expected value for Fe2+ in tetrahedral crystal fields and the Mossbauer spectrum indicates that long-range magnetic order is unlikely at 294 K. Our results suggest that BaFe2Se2O is a magnetic insulator at the borderline between a long-range antiferromagnetic spin ordering and possible spin dimerization.
T2  - Physical Review B: Condensed Matter and Materials Physics
T1  - Structure and physical properties of the layered iron oxychalcogenide BaFe2Se2O
VL  - 86
IS  - 19
DO  - 10.1103/PhysRevB.86.195133
ER  - 

@article{
author = "Lei, Hechang and Ryu, Hyejin and Ivanovski, Valentin N. and Warren, J. B. and Frenkel, A. I. and Cekić, Božidar Đ. and Yin, Wei-Guo and Petrović, Čedomir",
year = "2012",
abstract = "We have successfully synthesized a layered iron oxychalcogenide BaFe2Se2O single crystal. This compound is built up of Ba and Fe-Se(O) layers alternatively stacked along the c axis. The Fe-Se(O) layers contain double chains of edge-shared Fe-Se(O) tetrahedra that propagate along the b axis and are bridged by oxygen along the a axis. Physical property measurements indicate that BaFe2Se2O is a semiconductor without the Curie-Weiss behavior up to 350 K. There is a possible long-range antiferromagnetic transition at 240 K, corresponding to the peak in specific-heat measurement, and two transitions at 115 K and 43 K where magnetic susceptibility drops abruptly. The magnetic entropy up to 300 K is much smaller than the expected value for Fe2+ in tetrahedral crystal fields and the Mossbauer spectrum indicates that long-range magnetic order is unlikely at 294 K. Our results suggest that BaFe2Se2O is a magnetic insulator at the borderline between a long-range antiferromagnetic spin ordering and possible spin dimerization.",
journal = "Physical Review B: Condensed Matter and Materials Physics",
title = "Structure and physical properties of the layered iron oxychalcogenide BaFe2Se2O",
volume = "86",
number = "19",
doi = "10.1103/PhysRevB.86.195133"
}

Lei, H., Ryu, H., Ivanovski, V. N., Warren, J. B., Frenkel, A. I., Cekić, B. Đ., Yin, W.,& Petrović, Č.. (2012). Structure and physical properties of the layered iron oxychalcogenide BaFe2Se2O. in Physical Review B: Condensed Matter and Materials Physics, 86(19).
https://doi.org/10.1103/PhysRevB.86.195133

Lei H, Ryu H, Ivanovski VN, Warren JB, Frenkel AI, Cekić BĐ, Yin W, Petrović Č. Structure and physical properties of the layered iron oxychalcogenide BaFe2Se2O. in Physical Review B: Condensed Matter and Materials Physics. 2012;86(19).
doi:10.1103/PhysRevB.86.195133 .

Lei, Hechang, Ryu, Hyejin, Ivanovski, Valentin N., Warren, J. B., Frenkel, A. I., Cekić, Božidar Đ., Yin, Wei-Guo, Petrović, Čedomir, "Structure and physical properties of the layered iron oxychalcogenide BaFe2Se2O" in Physical Review B: Condensed Matter and Materials Physics, 86, no. 19 (2012),
https://doi.org/10.1103/PhysRevB.86.195133 . .