Mn3Ge-based tetragonal Heusler alloy thin films with addition
of Ni, Pt, and Pd

J 2020

Mn3Ge-based tetragonal Heusler alloy thin films with addition of Ni, Pt, and Pd

SEYD, Johannes; I. PILOTTEK; N. Y. SCHMIDT; Ondřej CAHA; M. URBANEK et. al.

Základní údaje

Originální název

Mn3Ge-based tetragonal Heusler alloy thin films with addition of Ni, Pt, and Pd

Autoři

SEYD, Johannes (garant); I. PILOTTEK; N. Y. SCHMIDT; Ondřej CAHA (203 Česká republika, domácí); M. URBANEK a M. ALBRECHT

Vydání

Journal of Physics: Condensed Matter, Bristol, IOP Publishing Ltd. 2020, 0953-8984

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 2.333

Kód RIV

RIV/00216224:14310/20:00116926

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1088/1361-648X/ab5e16

UT WoS

000507894100001

EID Scopus

2-s2.0-85082124171

Klíčová slova anglicky

Heusler alloys; perpendicular magnetic anisotropy; Mn3Ge; magnetic compensation

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 12. 11. 2020 14:58, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We have investigated substitution effects of Ni, Pt, and Pd on phase formation and magnetic properties of D0(22)-Mn3Ge thin films. We prepared (Mn1-xMx)(3)Ge thin films (M = Ni, Pt, Pd) at 650 degrees C by magnetron sputtering on MgO(0 0 1) substrates with x varying from 0.03 to 0.6. For improving the film quality, a Cr(0 0 1) seed layer was employed. The D0(22) structure formed only for the lowest concentrations of Ni and Pt. Nevertheless, the doped samples showed strong perpendicular magnetic anisotropy up to x = 0.1. For high Ni concentrations, we observed the formation of a soft ferromagnetic MnxNiy Ge phase with a Curie temperature of about 230 K, while in samples with high Pt content the antiferromagnet L1(0)-MnPt phase is formed along with GePt. In contrast, for Pd substitution, the D0(22) structure is preserved up to x = 0.2, exhibiting strong perpendicular magnetic anisotropy and low saturation magnetization. Interestingly, the coexistence of the D0(22)-Mn3Ge and a novel D0(22)-(Mn1-xPdx)(3)Ge phase was revealed, which might have been facilitated by the low lattice mismatch to the Cr(0 0 1) seed layer. With further increase of the Pd concentration, the D0(22) structure vanishes and mainly the GePd and GePd2 phases are present. Overall within the investigated sample series, the saturation magnetization strongly decreases with increasing dopant concentration, offering the possibility to adjust the saturation magnetization in the range between 20 and 100 emu cm(-3), while still preserving strong perpendicular magnetic anisotropy, which is important for spintronic applications.

Návaznosti

LM2015041, projekt VaV

Název: CEITEC Nano

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC Nano

Citovat

SEYD, Johannes; I. PILOTTEK; N. Y. SCHMIDT; Ondřej CAHA; M. URBANEK a M. ALBRECHT. Mn3Ge-based tetragonal Heusler alloy thin films with addition of Ni, Pt, and Pd. Journal of Physics: Condensed Matter. Bristol: IOP Publishing Ltd., 2020, roč. 32, č. 14, s. 1-11. ISSN 0953-8984. Dostupné z: https://dx.doi.org/10.1088/1361-648X/ab5e16.

@article{1692967,
   author = {Seyd, Johannes and Pilottek, I. and Schmidt, N. Y. and Caha, Ondřej and Urbanek, M. and Albrecht, M.},
   article_location = {Bristol},
   article_number = {14},
   doi = {http://dx.doi.org/10.1088/1361-648X/ab5e16},
   keywords = {Heusler alloys; perpendicular magnetic anisotropy; Mn3Ge; magnetic compensation},
   language = {eng},
   issn = {0953-8984},
   journal = {Journal of Physics: Condensed Matter},
   title = {Mn3Ge-based tetragonal Heusler alloy thin films with addition of Ni, Pt, and Pd},
   url = {https://iopscience.iop.org/article/10.1088/1361-648X/ab5e16},
   volume = {32},
   year = {2020}
}

TY  - JOUR
ID  - 1692967
AU  - Seyd, Johannes - Pilottek, I. - Schmidt, N. Y. - Caha, Ondřej - Urbanek, M. - Albrecht, M.
PY  - 2020
TI  - Mn3Ge-based tetragonal Heusler alloy thin films with addition of Ni, Pt, and Pd
JF  - Journal of Physics: Condensed Matter
VL  - 32
IS  - 14
SP  - 1-11
EP  - 1-11
PB  - IOP Publishing Ltd.
SN  - 09538984
KW  - Heusler alloys
KW  - perpendicular magnetic anisotropy
KW  - Mn3Ge
KW  - magnetic compensation
UR  - https://iopscience.iop.org/article/10.1088/1361-648X/ab5e16
L2  - https://iopscience.iop.org/article/10.1088/1361-648X/ab5e16
N2  - We have investigated substitution effects of Ni, Pt, and Pd on phase formation and magnetic properties of D0(22)-Mn3Ge thin films. We prepared (Mn1-xMx)(3)Ge thin films (M = Ni, Pt, Pd) at 650 degrees C by magnetron sputtering on MgO(0 0 1) substrates with x varying from 0.03 to 0.6. For improving the film quality, a Cr(0 0 1) seed layer was employed. The D0(22) structure formed only for the lowest concentrations of Ni and Pt. Nevertheless, the doped samples showed strong perpendicular magnetic anisotropy up to x = 0.1. For high Ni concentrations, we observed the formation of a soft ferromagnetic MnxNiy Ge phase with a Curie temperature of about 230 K, while in samples with high Pt content the antiferromagnet L1(0)-MnPt phase is formed along with GePt. In contrast, for Pd substitution, the D0(22) structure is preserved up to x = 0.2, exhibiting strong perpendicular magnetic anisotropy and low saturation magnetization. Interestingly, the coexistence of the D0(22)-Mn3Ge and a novel D0(22)-(Mn1-xPdx)(3)Ge phase was revealed, which might have been facilitated by the low lattice mismatch to the Cr(0 0 1) seed layer. With further increase of the Pd concentration, the D0(22) structure vanishes and mainly the GePd and GePd2 phases are present. Overall within the investigated sample series, the saturation magnetization strongly decreases with increasing dopant concentration, offering the possibility to adjust the saturation magnetization in the range between 20 and 100 emu cm(-3), while still preserving strong perpendicular magnetic anisotropy, which is important for spintronic applications.
ER  -

SEYD, Johannes; I. PILOTTEK; N. Y. SCHMIDT; Ondřej CAHA; M. URBANEK a M. ALBRECHT. Mn3Ge-based tetragonal Heusler alloy thin films with addition of Ni, Pt, and Pd. \textit{Journal of Physics: Condensed Matter}. Bristol: IOP Publishing Ltd., 2020, roč.~32, č.~14, s.~1-11. ISSN~0953-8984. Dostupné z: https://dx.doi.org/10.1088/1361-648X/ab5e16.

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