Effect of Co Substitution on Ni₂MnGe Heusler Alloy: ab initio Study

• Authors: M. Pugaczowa-Michalska
• Languages of publication: EN

Abstracts

EN

Ab initio calculations shown that the Co substitution instead of Ni in Ni₂MnGe with the L2₁ crystallographic structure leads to a decrease of the lattice constant and an increase of the total magnetic moment of the Ni_{2-x}Co_{x}MnGe compounds. The Mn(B) has the largest local moment above 3 μ_{B} coupled parallel to moments on the Ni(A,C) and Co(A,C), which are found in the ranges of 0.19÷0.26 μ_{B} for Ni(A,C) and 1.03÷0.97 μ_{B} for Co(A,C) for studied range of x. Using the results stemming from the total energy calculations, the values of bulk modulus and its pressure derivatives are estimated according to the Murnaghan EOS.

Keywords

EN

75.20.Hr; 71.23.-k; 75.70.Ak; 75.70.Cn

Discipline

• 71.23.-k: Electronic structure of disordered solids
• 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)
• 75.70.Cn: Magnetic properties of interfaces (multilayers, superlattices, heterostructures)
• 75.70.Ak: Magnetic properties of monolayers and thin films

• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 495-497

Dates

published

2018-03

Contributors

author

M. Pugaczowa-Michalska

• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

References

• [1] A. Chakrabarti, M. Siewert, T. Roy, K. Mondal, A. Banerjee, Markus E. Gruner, P. Entel, Phys. Rev. B 88, 174116 (2013), doi: 10.1103/PhysRevB.88.174116
• [2] T. Roy, Markus E. Gruner, P. Entel, A. Chakrabarti, J. Alloys Compnd. 632, 822 (2015), doi: 10.1016/j.jallcom.2015.01.255
• [3] S. Ishida, T. Masaki, S. Fujii, S. Asano, Physica B: Cond. Mater. 245, 1 (1998), doi: 10.1016/S0921-4526(97)00495-X
• [3a] J. Phys. Soc. Jpn. 64, 2152 (1995), doi: 10.1143/JPSJ.64.2152
• [4] M. Pugaczowa-Michalska, J. Alloys Compnd. 427, 54 (2007), doi: 10.1016/j.jallcom.2006.03.036
• [5] M. Pugaczowa-Michalska, Comput. Mater. Sci. 50, 15 (2010), doi: 10.1016/j.commatsci.2010.07.002
• [6] X.P. Wei, Y.D. Chu, X.W. Sun, J.B. Deng, Y. Z. Xing, J. Supercond. Nov. Magn. 27, 1099 (2014), doi: 10.1007/s10948-013-2370-6
• [7] M. Pugaczowa-Michalska, A. Jezierski, J. Dubowik, J. Kaczkowski, Acta Phys. Polon. A 115, 241 (2009), doi: 10.12693/APhysPolA.115.241
• [8] M.S. Lund, J.W. Dong, J. Lu, X.Y. Dong, C.J. Palmstrøm, C. Leighton, Appl. Phys. Lett. 80, 4798 (2002), doi: 10.1063/1.1489081
• [9] K. Koepernik, H. Eschrig, Phys. Rev. B 59, 1743 (1999), doi: 10.1103/PhysRevB.59.1743
• [10] I. Opahle, K. Koepernik, H. Eschrig, Phys. Rev. B 60, 14035 (1999), doi: 10.1103/PhysRevB.60.14035
• [11] J.P. Perdew, Y. Wang, Phys. Rev. B 45, 13244 (1992), doi: 10.1103/PhysRevB.45.13244
• [12] K. Koepernik, B. Velicky, R. Hayn, H. Eschrig, Phys. Rev. B 55, 5717 (1997), doi: 10.1103/PhysRevB.55.5717
• [13] R.M. Bozorth, Ferromagnetism, D. van Nostrang Company, New York 1951
• [14] F.D. Murnaghan, Proc. Natl.Acad. Sci USA 30, 244 (1944), doi: 10.1073/pnas.30.9.244

Identifiers

DOI

10.12693/APhysPolA.133.495