Effect of Ge substitution on magnetic properties in the itinerant chiral magnet MnSi

Aji, Seno; Ishida, Hidesato; Okuyama, Daisuke; Nawa, Kazuhiro; Hong, Tao; Sato, Taku J.

doi:10.1103/PhysRevMaterials.3.104408

Title: Effect of Ge substitution on magnetic properties in the itinerant chiral magnet MnSi

Journal Article · Mon Oct 14 00:00:00 EDT 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.3.104408· OSTI ID:1570897

^[1]; Ishida, Hidesato ^[1]; Okuyama, Daisuke ^[1];

^[1];

^[2]; Sato, Taku J. ^[1]

Tohoku Univ., Sendai (Japan)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We have investigated the effect of Ge substitution on the magnetic ordering in the B20 itinerant chiral magnet MnSi prepared by melting and annealing under ambient pressure. From a metallurgical survey, the solubility limit of Ge was found to be x = 0.144(5) with annealing temperature T_an = 1073 K. Magnetization measurements on MnSi_1–xGe_x samples show that the helical ordering temperature T_c increases rapidly in the low-x range, whereas it becomes saturated at higher concentration x > 0.1. Here, the Ge substitution also increases both the saturation magnetization M_s and the critical field to the fully polarized state H_c2. In contrast to the saturation behavior of T_c, those parameters increase linearly up to the highest Ge concentration investigated. In the temperature-magnetic field phase diagram, we found enlargement of the skyrmion phase region for large x samples. We, furthermore, observed the nonlinear behavior of helical modulation vector k as a function of Ge concentration, which can be described qualitatively using the mean field approximation.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1570897

Alternate ID(s):: OSTI ID: 1607533

Journal Information:: Physical Review Materials, Vol. 3, Issue 10; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (28)

Magnetism and spin fluctuations in a weak itinerant ferromagnet: MnSi Thessieu, C.; Flouquet, J.; Lapertot, G. Solid State Communications, Vol. 95, Issue 10 https://doi.org/10.1016/0038-1098(95)00356-8	journal	September 1995
Substitutional effect on the transport properties of MnSi Sivakumar, K. M.; Kuo, Y. K.; Lue, C. S. Journal of Magnetism and Magnetic Materials, Vol. 304, Issue 1 https://doi.org/10.1016/j.jmmm.2006.02.066	journal	September 2006
Magnetic structure of MnSi under an applied field probed by polarized small-angle neutron scattering Grigoriev, S. V.; Maleyev, S. V.; Okorokov, A. I. Physical Review B, Vol. 74, Issue 21 https://doi.org/10.1103/PhysRevB.74.214414	journal	December 2006
Implications of the B20 crystal structure for the magnetoelectronic structure of $MnSi$ Jeong, T.; Pickett, W. E. Physical Review B, Vol. 70, Issue 7 https://doi.org/10.1103/PhysRevB.70.075114	journal	August 2004
Magnetic phase diagram of MnSi inferred from magnetization and ac susceptibility Bauer, A.; Pfleiderer, C. Physical Review B, Vol. 85, Issue 21 https://doi.org/10.1103/PhysRevB.85.214418	journal	June 2012
Frustrated magnetic helices in MnSi-type crystals Chizhikov, Viacheslav A.; Dmitrienko, Vladimir E. Physical Review B, Vol. 85, Issue 1 https://doi.org/10.1103/PhysRevB.85.014421	journal	January 2012
Spin waves in full-polarized state of Dzyaloshinskii-Moriya helimagnets: Small-angle neutron scattering study Grigoriev, S. V.; Sukhanov, A. S.; Altynbaev, E. V. Physical Review B, Vol. 92, Issue 22 https://doi.org/10.1103/PhysRevB.92.220415	journal	December 2015
Skyrmion Lattice in a Chiral Magnet Muhlbauer, S.; Binz, B.; Jonietz, F. Science, Vol. 323, Issue 5916 https://doi.org/10.1126/science.1166767	journal	February 2009
Quantum phase transitions in single-crystal ${Mn}_{1 - x} {Fe}_{x} Si$ and ${Mn}_{1 - x} {Co}_{x} Si$ : Crystal growth, magnetization, ac susceptibility, and specific heat Bauer, A.; Neubauer, A.; Franz, C. Physical Review B, Vol. 82, Issue 6 https://doi.org/10.1103/PhysRevB.82.064404	journal	August 2010
Recent advances in magnetic structure determination by neutron powder diffraction Rodríguez-Carvajal, Juan Physica B: Condensed Matter, Vol. 192, Issue 1-2 https://doi.org/10.1016/0921-4526(93)90108-I	journal	October 1993
Effect of negative chemical pressure on the prototypical itinerant magnet MnSi Dhital, C.; Khan, M. A.; Saghayezhian, M. Physical Review B, Vol. 95, Issue 2 https://doi.org/10.1103/PhysRevB.95.024407	journal	January 2017
Magnetic ordering in bulk MnSi crystals with chemically induced negative pressure Potapova, Nadya; Dyadkin, Vadim; Moskvin, Evgeniy Physical Review B, Vol. 86, Issue 6 https://doi.org/10.1103/PhysRevB.86.060406	journal	August 2012
Helical spin structure in manganese silicide MnSi Ishikawa, Y.; Tajima, K.; Bloch, D. Solid State Communications, Vol. 19, Issue 6 https://doi.org/10.1016/0038-1098(76)90057-0	journal	July 1976
Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets Fujishiro, Y.; Kanazawa, N.; Nakajima, T. Nature Communications, Vol. 10, Issue 1 https://doi.org/10.1038/s41467-019-08985-6	journal	March 2019
Topological Hall Effect in the $A$ Phase of MnSi Neubauer, A.; Pfleiderer, C.; Binz, B. Physical Review Letters, Vol. 102, Issue 18 https://doi.org/10.1103/PhysRevLett.102.186602	journal	May 2009
Cubic magnets with Dzyaloshinskii-Moriya interaction at low temperature Maleyev, S. V. Physical Review B, Vol. 73, Issue 17 https://doi.org/10.1103/PhysRevB.73.174402	journal	May 2006
Helical spin structure of ${Mn}_{1 - y} {Fe}_{y} Si$ under a magnetic field: Small angle neutron diffraction study Grigoriev, S. V.; Dyadkin, V. A.; Moskvin, E. V. Physical Review B, Vol. 79, Issue 14 https://doi.org/10.1103/PhysRevB.79.144417	journal	April 2009
Magnetic excitations in the weak itinerant ferromagnet MnSi Ishikawa, Y.; Shirane, G.; Tarvin, J. A. Physical Review B, Vol. 16, Issue 11 https://doi.org/10.1103/PhysRevB.16.4956	journal	December 1977
Structural and thermal properties of MnSi single crystal Tite, T.; Shu, G. J.; Chou, F. C. Applied Physics Letters, Vol. 97, Issue 3 https://doi.org/10.1063/1.3464980	journal	July 2010
Magnetic Properties of the Monosilicides of Some 3 d Transition Elements Williams, H. J.; Wernick, J. H.; Sherwood, R. C. Journal of Applied Physics, Vol. 37, Issue 3 https://doi.org/10.1063/1.1708422	journal	March 1966
Skyrmion lattice structural transition in MnSi Nakajima, Taro; Oike, Hiroshi; Kikkawa, Akiko Science Advances, Vol. 3, Issue 6 https://doi.org/10.1126/sciadv.1602562	journal	June 2017
Exploring the origins of the Dzyaloshinskii-Moriya interaction in MnSi Dhital, C.; DeBeer-Schmitt, L.; Zhang, Q. Physical Review B, Vol. 96, Issue 21 https://doi.org/10.1103/PhysRevB.96.214425	journal	December 2017
Simple Models of Magnetism Skomski, Ralph Oxford University Press https://doi.org/10.1093/acprof:oso/9780198570752.001.0001	book	January 2008
Magnetic fluctuations and correlations in MnSi: Evidence for a chiral skyrmion spin liquid phase Pappas, C.; Lelièvre-Berna, E.; Bentley, P. Physical Review B, Vol. 83, Issue 22 https://doi.org/10.1103/PhysRevB.83.224405	journal	June 2011
Demagnetizing factors for rectangular ferromagnetic prisms Aharoni, Amikam Journal of Applied Physics, Vol. 83, Issue 6 https://doi.org/10.1063/1.367113	journal	March 1998
Skyrmion Lattice in a Chiral Magnet Mühlbauer, S.; Binz, B.; Jonietz, F. arXiv https://doi.org/10.48550/arxiv.0902.1968	text	January 2009
Exploring the origins of the Dzyalloshinski-Moria interaction in MnSi Dhital, Chetan; DeBeer-Schmitt, Lisa; Zhang, Qiang arXiv https://doi.org/10.48550/arxiv.1707.05673	text	January 2017
Implications of the B20 Crystal Structure for the Magneto-electronic Structure of MnSi Jeong, T.; Pickett, W. E. arXiv https://doi.org/10.48550/arxiv.cond-mat/0403442	text	January 2004