Unusual magnetization and field switching effects in multifunctional Ba, Ni-doped YCrO3 polycrystalline samples

被引：0

作者：

Das, Souvick ^{[1
]}

Mitra, Ayan ^{[2
]}

Sadhukhan, Sukhendu ^{[3
]}

Mondal, Manas ^{[1
]}

Kumar, Amit ^{[4
,5
]}

Chakrabarti, Pabitra Kumar ^{[1
]}

机构：

[1] Burdwan Univ, Dept Phys, Solid State Res Lab, Burdwan 713104, India

[2] City Coll, Dept Phys, Kolkata 700009, India

[3] Dr Sudhir Chandra Sur Inst Technol & Sports Comple, Dept Phys Basic Sci & Humanities, Kolkata 700074, West Bengal, India

[4] Homi Bhabha Natl Inst, Mumbai 400094, India

[5] Bhabha Atom Res Ctr, Solid State Phys Div, Mumbai 400085, India

来源：

PHYSICAL REVIEW MATERIALS | 2024年 / 8卷 / 11期

关键词：

NEGATIVE MAGNETIZATION; DIELECTRIC-PROPERTIES; EXCHANGE-BIAS; MN; REVERSALS;

D O I：

10.1103/PhysRevMaterials.8.114406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, YCrO3 and Ba and Ni co-doped YCrO3 (Ba 0 . 05 Y 0 . 95 Cr 0 . 95 Ni 0 . 05 O 3 ) polycrystalline samples were prepared using the standard sol-gel method, and their structure, surface morphology, and electrical and magnetic properties were examined. The samples crystallize in an orthorhombic Pnma structure. Rietveld analysis of all x-ray diffraction patterns revealed a decrease in lattice constant from 5.5230(7) & Aring; to 5.4991(4) & Aring; and a crystallite size reduction from '-' 68 . 64(4) nm (YCrO3, YCO) to '-' 58 . 86(3) nm (Ba 0 . 05 Y 0 . 95 Cr 0 . 95 Ni 0 . 05 O 3 , BYNCO). Furthermore, the deviation of the Cr-O1-Cr bond angle, octahedral distortion, off-center displacement of A-site ions, and rotation of CrO6 due to doping appear to strongly affect the magnetic and electric properties. The distortion parameter values increased for the doped sample compared to that of the pristine one. The samples exhibited paramagnetic behavior at 300 K (room temperature), with a paramagnetic-to-antiferromagnetic transition occurring at 145 K for YCO and at 130.9 K for BYNCO. The fitting of the magnetization vs field (MH) loop aids in quantifying the extent of weak ferromagnetism in the samples. The presence of negative magnetization has been attributed to the temperature-induced magnetization-reversal phenomenon. The neutron diffraction study infers a G-type antiferromagnetic ordering in BYNCO with ordered Cr moment of 2.44(3)mu B (30 K) along the c direction. The dielectric properties were fitted using the Cole-Cole equation, and the obtained parameters were analyzed. Ferroelectricity seemed to be enhanced, with a higher maximum polarization observed for Ba 0 . 05 Y 0 . 95 Cr 0 . 95 Ni 0 . 05 O 3 compared to YCrO3. Characterization of leakage current density (J) vs electric field (E) indicates a reduction in leakage current in BYNCO compared to the bare one. All these findings would be interesting for a detailed theoretical study for applications in future generation devices.

引用

页数：16