Spin Glass Freezing in the Superconducting YBa 2 (Cu 0.88 Fe 0.12 ) 3 O 7
1989; Institute of Physics; Volume: 9; Issue: 2 Linguagem: Inglês
10.1209/0295-5075/9/2/015
ISSN1286-4854
AutoresI. Mirebeau, M. Hennion, G. Coddens, Terry Phillips, K. Moorjani,
Tópico(s)Magnetic Properties and Applications
ResumoThe neutron time-of-flight measurements on the superconducting oxide YBa2(Cu0.88Fe0.12)3O7 (Tc = 32 K) reveal that the dynamics of iron spins are akin to those observed in archetypal spin glasses with a transition to the spin glass state occurring at about 40 K. The persistence of superconductivity in spite of the noncollinear magnetic ordering of iron spins implies little interaction between the superconducting and magnetic "lattices".
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