authors |
Marcano, N; Algarabel, PA; Barquin, LF; Araujo, JP; Pereira, AM; Belo, JH; Magen, C; Morellon, L; Ibarra, MR |
nationality |
International |
journal |
PHYSICAL REVIEW B |
keywords |
NONLINEAR AC SUSCEPTIBILITY; SPIN-GLASSES; TRANSITION; BEHAVIOR |
abstract |
The static magnetization and dynamic susceptibility responses of the cluster system within a Griffiths phase of the magnetocaloric compound Tb5-xLaxSi2Ge2 (x = 0.075) have been investigated. A novel cluster-glass state within the Griffiths phase is formed at a characteristic freezing temperature where short-range ferromagnetic correlations set in the paramagnetic regime. Ferromagneticlike correlations are built up at around 155 K, which suddenly become frozen at a lower temperature similar to 140 K, thus in analogy with a reentrant spin glass behavior. The ac susceptibility near the freezing temperature follows a critical slowing down process characterized by tau(0) = 10(-13)s and dynamic exponents zv similar to 6 and beta similar to 0.4, similar to well-known spin glass systems. The nonlinear ac susceptibility analysis shows clearly the existence of a transition associated to the reentrant behavior. The origin of the intermediate cluster-glass phase inside the Griffiths phase is proposed to be the result of a combination of short-ranged RKKY intralayer positive exchange interactions between rare-earth Tb3+ ions and antiferromagnetic exchange between adjacent interlayers involving Si and Ge atoms in connection to the Tb(3+)atoms. |
publisher |
AMER PHYSICAL SOC |
issn |
2469-9950 |
isbn |
2469-9969 |
year published |
2019 |
volume |
99 |
issue |
5 |
digital object identifier (doi) |
10.1103/PhysRevB.99.054419 |
web of science category |
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter |
subject category |
Materials Science; Physics |
unique article identifier |
WOS:000459221500008
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
3.575 |
5 year journal impact factor |
3.511 |
category normalized journal impact factor percentile |
70.187 |
dimensions (citation analysis):
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altmetrics (social interaction):
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