@inproceedings{a7d87dfd00d84f9b97ae3f563f467586,
title = "High pressure synthesis and magnetic properties of cubic B20 MnGe and CoGe",
abstract = "Samples of MnGe and CoGe having cubic B20 structure were prepared at high pressure. Magnetic measurements showed that CoGe is a Pauli paramagnet, but MnGe exhibits antiferromagnetic-type ordering below TN = 175 K. The magnetic susceptibility of MnGe follows a Curie-Weiss law above 300 K with an effective magnetic moment μeff = 3.68 μB/f.u. and θp = + 231 K. The large positive value of θp indicates a strong ferromagnetic exchange. The value of the effective moment is close to the free Mn4+ ion (4F3/2) value 3.87 μB/f.u. From measurements of the magnetization of MnGe in fields up to 60 kOe and in the temperature range 2-350 K, we constructed its T-H magnetic phase diagram which is similar to that proposed for MnSi-type compounds with helical magnetic order. Specific heat measurements reveal that the total magnetic entropy of MnGe relative to nonmagnetic CoGe is equal to 3.55 J/mole-K (0.62Rln2).",
keywords = "B20 structure, CoGe, Helimagnet, High pressure synthesis, Magnetization, MnGe, Specific heat",
author = "Tsvyashchenko, \{A. V.\} and Sidorov, \{V. A.\} and Fomicheva, \{L. N.\} and Krasnorussky, \{V. N.\} and Sadykov, \{R. A.\} and Thompson, \{J. D.\} and K. Gofryk and F. Ronning and Ivanov, \{V. Yu\}",
year = "2012",
doi = "10.4028/www.scientific.net/SSP.190.225",
language = "English",
isbn = "9783037854365",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications Ltd",
pages = "225--228",
booktitle = "Magnetism and Magnetic Materials V",
note = "5th Moscow International Symposium on Magnetism, MISM 2011 ; Conference date: 21-08-2011 Through 25-08-2011",
}