Stress-induced magnetic textures and fluctuating chiral phase in MnGe chiral magnetстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 декабря 2014 г.
Аннотация:We have studied the MnGe chiral magnet below TN = 170 K, by magnetic measurements, M¨ossbauer
spectroscopy, and by neutron diffraction at ambient and under nonhydrostatic pressure. At ambient pressure,
we observe the coexistence of two magnetic phases belonging to the same crystal phase in a large temperature
range (down to 100 K) below TN: ferromagnetically correlated rapidly fluctuating spins coexist with frozen spins
involved in the helical order. Applying a uniaxial pressure component induces a strong magnetic texture, where
most of the helical axes reorient along the stress axis. The magnetic texture persists in the fluctuating chiral state
up to TN. Our results suggest that the zero field ground state at ambient pressure is a multidomain state consisting
of helical domains with random orientations rather than a three-dimensional skyrmion lattice. They show the
presence of an unusually broad transition to paramagnetism with a dynamical phase separation triggered by
temperature.