Abstract
An extensive magnetization study in pulsed fields up to 62 T and at temperatures down to ~0.7 K has been performed on the single crystals of hexagonal manganite HoMnO3. For magnetic fields (H) applied along the c-axis, successive magnetic transitions below 10 T and a step-like transition at ~41 T are observed. The phase diagram for H//c is very complex and new phase boundaries are explored below 6 K. This phase diagram is compared with the early results derived from dielectric constant and neutron scattering measurements. For H//a, two magnetic transitions are found below 3 T dome-shaped and the phase diagram is reported for the first time. The variety of magnetic symmetries of the field-induced magnetic phases is discussed.
Highlights
Field-induced magnetic phase transition, characterized as a change in magnetization, is a long-standing issue of magnetic materials [1]
The phase diagram of h-HoMnO3 for H along the c-axis is extremely complex for H < 8 T
We measure the magnetization of h-HoMnO3 in a pulsed-field up to 62 T and explore a new transition at ~41 T for H//c
Summary
Field-induced magnetic phase transition, characterized as a change in magnetization, is a long-standing issue of magnetic materials [1]. The phase diagram of h-HoMnO3 for H along the c-axis is extremely complex for H < 8 T. 5 K, whereas below this temperature more phases and phase boundaries were explored by means of different experimental techniques [5,6,7,8,9,10,11]. Ions, which orient along the c-axis, is rarely studied [15]. Crystals 2019, 9, x FOR PEER REVIEW motivate a reinvestigation of the field-induced magnetic transitions and phase diagram of h-HoMnO3 questions motivate a reinvestigation of the field-induced magnetic transitions and phase diagram of using other experimental techniques.
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