无翻转：外场作用下各向异性铁磁体中一种新的亚稳“倾斜”态
Tipping without Flipping: A Novel Metastable "Tilted" State in Anisotropic Ferromagnets in External Fields
摘要：
我们表明，在适当的各向异性铁磁体，稳定和亚稳定的“倾斜”相发生，其中磁化${\vec M}$使零和$180$度之间的角度与外部施加的${\vec H}$。调整外部场的大小或温度可以导致这些状态之间的连续转变。一个独特的特征是这些转变之一是在两个{ \it亚稳态}状态之间。在跃迁附近，纵向磁化率变得异常，其指数与临界指数具有{ \it exact}标度关系。
英文摘要：
We show that in suitable anisotropic ferromagnets, both stable and metastable ``tilted'' phases occur, in which the magnetization ${\vec M}$ makes an angle between zero and $180$ degrees with the externally applied ${\vec H}$. Tuning either the magnitude of the external field or the temperature can lead to continuous transitions between these states. A unique feature is that one of these transitions is between two {\it metastable} states. Near the transitions the longitudinal susceptibility becomes anomalous with an exponent which has an {\it exact} scaling relation with the critical exponents.
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