Anomalous compression behavior in lanthanum/cerium-based metallic glass under high pressure.
In situ high-pressure x-ray diffraction, low-temperature resistivity, and magnetization experiments were performed on a La(32)Ce(32)Al(16)Ni(5)Cu(15) bulk metallic glass (BMG). A sudden change in compressibility at approximately 14 GPa and a rapid increase of resistivity at approximately 12 K were detected, whereas magnetic phase transformation and magnetic field dependence of the low-temperature resistivity do not occur at temperatures down to 4.2 K. An interaction between conduction electrons and the two-level systems is suggested to explain the temperature and field dependences of resistivity of the BMG alloy. Although the cause of the unusual change in compressibility at approximately 14 GPa is not clear, we believe that it could be linked with the unique electron structure of cerium in the amorphous matrix. An electronic phase transition in BMG alloys, most likely a second-order amorphous-to-amorphous phase transition, is suggested.
Zeng
Q S
QS
International Center for New-Structured Materials and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China.
Li
Y C
YC
Feng
C M
CM
Liermann
P
P
Somayazulu
M
M
Shen
G Y
GY
Mao
H-K
HK
Yang
R
R
Liu
J
J
Hu
T D
TD
Jiang
J Z
JZ
Nature. 2000 Jan 13;403(6766):170-3
10646596
Phys Rev Lett. 1987 Mar 23;58(12):1232-1235
10034376
Phys Rev B Condens Matter. 1993 Aug 1;48(6):3591-3599
10008804
Phys Rev Lett. 2000 May 15;84(20):4629-32
10990757
Nat Mater. 2003 Nov;2(11):739-43
14556000
Nat Mater. 2007 Mar;6(3):192-7
17310140
Nature. 2001 Dec 6;414(6864):622-5
11740555
Phys Rev Lett. 2000 Jul 10;85(2):334-6
10991276