Journal
PHYSICAL REVIEW B
Volume 71, Issue 18, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.71.180412
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The dynamical magnetic properties of an Ising spin glass (SG) Fe0.55Mn0.45TiO3 are studied under various magnetic fields. Having determined the temperature and static-field-dependent relaxation time tau(T;H) from ac magnetization measurements under a do bias field by a general method, we first demonstrate that these data provide evidence for a SG phase transition only in zero field. We next argue that the data tau(T;H) of finite H can be well interpreted by the droplet theory, which predicts the absence of a SG phase transition in finite fields.
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