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Philosophical Magazine Volume 93, 2013 - Issue 9
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Part B: Condensed Matter Physics

Spin glass and glass-like lattice behaviour in HoB66 at low temperatures

V.V. Novikov Bryansk Physical Laboratory, Petrovsky Bryansk State University, Bedgitskaya, 14, 241036, Bryansk, Russia
,
D.V. Avdashchenko Bryansk Physical Laboratory, Petrovsky Bryansk State University, Bedgitskaya, 14, 241036, Bryansk, RussiaCorrespondence[email protected]
,
S.L. Bud'ko Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
,
N.V. Mitroshenkov Bryansk Physical Laboratory, Petrovsky Bryansk State University, Bedgitskaya, 14, 241036, Bryansk, Russia
,
A.V. Matovnikov Bryansk Physical Laboratory, Petrovsky Bryansk State University, Bedgitskaya, 14, 241036, Bryansk, Russia
,
H. Kim Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
,
M.A. Tanatar Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
&
R. Prozorov Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
 show all
Pages 1110-1123 | Received 29 Jun 2012, Accepted 07 Oct 2012, Published online: 30 Oct 2012
 
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Abstract

The low-temperature specific heat, magnetic susceptibility, and thermal expansion are studied experimentally in the fcc boride HoB66 and compared to similar quantities in non-magnetic LuB66. The anomalous behaviour observed in HoB66 is explained within a glass-like picture together with magnetic subsystem ordering processes. The character of the observed anomalies suggests the existence of a spin-glass phase transition in HoB66 below a characteristic temperature of T s  ≈ 0.98 K.

Acknowledgements

The work at Bryansk was supported by the RFBR (Grant 11-02-97-502 - r_center_a) and the Russian Ministry of Education and Science (Grant DSP 2.1.1/10747). The work at Ames was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under contract No. DE-AC02-07CH11358.

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