Complexity in the structural and magnetic properties of almost multiferroicEuTiO3

Intriguing spin–lattice interactions in EuTiO3

“…The interplay between both was predicted to induce “hidden” spin order visible in the magnetic susceptibility 16 , the birefringence 17 , the Raman response 18 , the lattice constants 19 and the dielectric properties 20 . Very convincing breakthrough confirmations of these predictions have been achieved by muon spin rotation (µSR) experiments 21 – 24 , which are the most sensitive tools to detect any kind of magnetic order, even if this is not visible by bulk probing experiments. From birefringence as well as XRD, dielectric, and µSR data taken under the action of an external magnetic field 17 , 19 – 21 a novel phase transition could be detected in ETO which takes place around 210 K and must be accompanied by a symmetry lowering.…”

“…Very convincing breakthrough confirmations of these predictions have been achieved by muon spin rotation (µSR) experiments 21 – 24 , which are the most sensitive tools to detect any kind of magnetic order, even if this is not visible by bulk probing experiments. From birefringence as well as XRD, dielectric, and µSR data taken under the action of an external magnetic field 17 , 19 – 21 a novel phase transition could be detected in ETO which takes place around 210 K and must be accompanied by a symmetry lowering. Since these experiments have been performed in an external magnetic field one could argue that the field causes this new phase which consequently should be absent once the field is removed.…”

Pressure tuning of structure, superconductivity, and novel magnetic order in the Ce-underdoped electron-doped cuprate T′−Pr1.3−xLa0.7Guguchia1, Adachi2, Shermadini3 et al. 2017Phys. Rev. BSelf Cite8020View full textAdd to dashboardCite

“…It is interesting that the magnetic fraction is nearly pressure independent, while the SC fraction reduces substantially. This is different from hole-doped cuprates with the static spin and charge order, in which µSR observes phase separation between magnetism and superconductivity [15,18]. In addition, the magnetic order in Pr 1.2 La 0.7 Ce 0.1 CuO 4 remains short range up to the highest applied pressure, which probably suggests that the superconductivity is not suppressed above p 2.1 GPa, but it becomes filamentary and still inhibits the long-range magnetic order in the system.…”

“…One school of thought suggests that the doped charge carriers segregate into inhomogeneous patterns, such as stripes (spin and charge orders), to allow the antiferromagnetic (AFM) regions to survive [9]. In this picture, the observed quasi two-dimensional (2D) incommensurate spin density wave (SDW) in hole-doped high-T c superconductors, such as La 2−x Sr x CuO 4 [10][11][12][13][14][15] and La 2 CuO 4+δ [16], is due to remnants of the AFM insulating phase that compete with superconductivity (SC) [17,18]. While charge ordering (CO) has emerged as a universal feature of hole-doped (p-type) cuprates [10,[19][20][21][22][23][24], observation of charge ordering in n-type cuprate system Nd 2−x Ce x CuO 4 (NCCO) with x = 0.14-0.15 was reported only very recently [25,26].…”

Cation Valences and Multiferroic Properties of EuTiO3 Co-Doped with Ba and Transition Metals of Co/Ni

“…Pristine and doped EuTiO 3 , in both bulk and thin-film forms, have been studied intensively during the past ten years or so due to a variety of interesting properties including multiferroicity [ 1 , 2 , 3 ], hidden spin orders [ 4 , 5 , 6 ], large magnetodielectric and magnetocaloric effects [ 7 , 8 , 9 , 10 ], etc. EuTiO 3 belongs to the perovskite-structured oxides, which has an undistorted cubic lattice at room temperature (RT).…”