TY - JOUR
T1 - Suppression of magnon excitations in Co2MnSi Heusler alloy by Nd doping
AU - Rajanikanth, A.
AU - Takahashi, Y. K.
AU - Hono, K.
N1 - Funding Information:
A.R. acknowledges the International Center for Young Scientist (ICYS), NIMS, for provision of the ICYS fellowship. A.R. also acknowledges Dr. Lee and Mr. Gorripati for helping in HRTEM analysis. This work was in part supported by the Graint-in-Aid for Scientific Research on Priority Area on “Spin Current,” PREST, JST, and World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitronics, MEXT, Japan.
PY - 2009
Y1 - 2009
N2 - We have investigated the effect of Nd doping on the transport and magnetic properties of Co2 MnSi. The substitution of 1.25 at. % Nd for Co results in a single L 21 phase with a thin layer of Nd enriched phase grain boundaries. However, from resistivity measurements at low temperatures, the suppression of electron-magnon scattering was observed in the alloy with Nd enriched phase. The magnetic moment of Co2 MnSi was 5.01 μB, whereas that of Co1.95 Nd0.05 MnSi is 5.35 μB, which indicates that the Nd rich phase couples ferromagnetically with the Co1.95 Nd0.05 MnSi phase. Moreover, point contact Andreev reflection measurements at 4.2 K have shown almost the same spin polarization with (P=0.59) and without Nd doping (P=0.58), indicating that Nd enrichment in the grain boundary does not hamper the spin polarization, but prevents the temperature dependent decay of transport properties.
AB - We have investigated the effect of Nd doping on the transport and magnetic properties of Co2 MnSi. The substitution of 1.25 at. % Nd for Co results in a single L 21 phase with a thin layer of Nd enriched phase grain boundaries. However, from resistivity measurements at low temperatures, the suppression of electron-magnon scattering was observed in the alloy with Nd enriched phase. The magnetic moment of Co2 MnSi was 5.01 μB, whereas that of Co1.95 Nd0.05 MnSi is 5.35 μB, which indicates that the Nd rich phase couples ferromagnetically with the Co1.95 Nd0.05 MnSi phase. Moreover, point contact Andreev reflection measurements at 4.2 K have shown almost the same spin polarization with (P=0.59) and without Nd doping (P=0.58), indicating that Nd enrichment in the grain boundary does not hamper the spin polarization, but prevents the temperature dependent decay of transport properties.
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U2 - 10.1063/1.3100040
DO - 10.1063/1.3100040
M3 - Article
AN - SCOPUS:63749127160
SN - 0021-8979
VL - 105
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 6
M1 - 063916
ER -