Interplay between effects of external pressure and dilution of the U-sublattice in UCoAl-based materials: the U_0.94Y_0.06CoAl case

A. V. Andreev Institute of Physics, Academy of Sciences, Na Slovance 2, Prague, 18221, Czech RepublicCorrespondence[email protected]

K. Koyama Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8578, Japan

N. V. Mushnikov Institute of Metal Physics, Academy of Sciences, Kovalevskaya 18, Ekaterinburg, 620219, Russia

V. Sechovsky Department of Electronic Structures, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague, 12116, Czech Republic

Y. Shiokawa Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8578, Japan

I. Satoh Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8578, Japan

K. Watanabe Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8578, Japan

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Abstract

Substitution of Y for U in the itinerant 5f-electron metamagnet, UCoAl, transforms the system to a ferromagnetic state. Application of external hydrostatic pressure above 0.3 GPa suppresses the spontaneous ferromagnetism and restores the paramagnetism with field-induced transition to ferromagnetic state. However, the transition becomes of the second order instead of the first-order one in parent UCoAl.

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Acknowledgements

The work of V.S. and A.V.A. is a part of the research plans MSM 0021620834 (Ministry of Education of the Czech Republic) and AVOZ10100520 (Academy of Sciences of Czech Republic), respectively. It has been also supported by grants GACR 202/06/0178 and GAAV IAA100100530.

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Interplay between effects of external pressure and dilution of the U-sublattice in UCoAl-based materials: the U_0.94Y_0.06CoAl case

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Interplay between effects of external pressure and dilution of the U-sublattice in UCoAl-based materials: the U0.94Y0.06CoAl case

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Interplay between effects of external pressure and dilution of the U-sublattice in UCoAl-based materials: the U_0.94Y_0.06CoAl case