Antisite Disorder-induced Exchange Bias Effect in Multiferroic Y2CoMnO6
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The role of antisite disorder in creating the domain structure leading to exchange bias effect is highlighted in this paper, where a model based on growth of ferromagnetic domains overcoming the elastic energy of structurally pinned magnetic interfaces, which closely resembles martensitic-like transitions, is adapted to explain the observed effects.Abstract:
Exchange bias effect in the ferromagnetic double perovskite compound Y$_2$CoMnO$_6$, which is also a multiferroic, is reported. The exchange bias, observed below 8~K, is explained as arising due to the interface effect between the ferromagnetic and antiferromagnetic clusters created by {\it antisite} disorder in this material. Below 8~K, prominent ferromagnetic hysteresis with metamagnetic "steps" and significant coercive field, $H_c \approx$ 10~kOe are observed in this compound which has a $T_c \approx$ 75~K. A model based on growth of ferromagnetic domains overcoming the elastic energy of structurally pinned magnetic interfaces, which closely resembles martensitic-like transitions, is adapted to explain the observed effects. The role of {\it antisite} disorder in creating the domain structure leading to exchange bias effect is highlighted in the present work.read more
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Role of 3d–4f exchange interaction and local anti-site defects in the magnetic and magnetocaloric properties of double perovskite Ho2CoMnO6 compound
Dipak Mazumdar,I. Das +1 more
TL;DR: In this article, a detailed investigation of the crystal structure, magnetic, and magnetocaloric properties of the ordered monoclinic polycrystalline double perovskite Ho 2 CoMnO 6 (HCMO) compound was performed.
Journal ArticleDOI
Spin-phonon coupling in multiferroic Y2CoMnO6
Rosivaldo Xavier da Silva,Manoel Carvalho Castro Junior,S. Yáñez-Vilar,S. Yáñez-Vilar,Manuel Sánchez Andújar,Jorge Mira,María Antonia Señarís-Rodríguez,Carlos William de Araujo Paschoal +7 more
TL;DR: In this article, the spin-phonon coupling in rare-earth based manganites with double perovskite structure plays a crucial role in the magnetoelectric properties of these ferromagnetic materials.
Journal ArticleDOI
Strong magnetoelectric coupling in mixed ferrimagnetic-multiferroic phases of a double perovskite.
TL;DR: The results based on intricate magnetic correlations and phases in Er2CoMnO6 enrich fundamental and applied research on magnetic materials through the scope of distinct magnetic characteristics in double perovskites.
Journal ArticleDOI
Magnetoelectricity coupled exchange bias in BaMnF4.
Shuang Zhou,Shuang Zhou,Ji Wang,Xiaofeng Chang,Shuangbao Wang,B. Qian,Z.D. Han,Qingyu Xu,Jun Du,Peng Wang,Shuai Dong,Shuai Dong +11 more
TL;DR: The exchange bias in BaMnF4 is argued to be a bulk effect in single phase, due to the magnetization pinned by the polarization through magnetoelectric coupling, which is consistent with the two-dimensional to three-dimensional antiferromagnetic transition at Néel temperature.
Journal ArticleDOI
Effect of Preparation Conditions on Magnetic and Dielectric Properties of Y2MMnO6 (M = Co, Ni)
Vasundhara Katari,P. D. Babu,Sanjaya K. Mishra,Ranjan Mittal,Samatha Bevara,Srungarpu N. Achary,Sudhansu K. Deshpande,Avesh K. Tyagi +7 more
Abstract: Herein we report the structure, magnetic and dielectric properties of Y2CoMnO6 (YCMO) and Y2NiMnO6 (YNMO) prepared under various conditions. On annealing in inert atmosphere, YCMO sample shows a partial decomposition while YNMO remains unaffected. Both YCMO and YNMO samples show paramagnetic to ferromagnetic transition around 80 K, but only the magnetic properties of YCMO samples depend on the preparation conditions. YCMO samples show antiferromagnetic ground state in zero field and a metamagnetic transition at relatively low field (~2 T). Differences in the annealing environment do not destroy the initial antiparallel spin order in YCMO, but affect the critical fields of metamagnetic transition. The field-dependent magnetic properties indicated soft ferromagnetic nature of YNMO samples. The dielectric measurements show distinct frequency and temperature-dependent features in YCMO samples compared to YNMO samples. A large relative permittivity with e׳ of about 104 is observed in both O2 and air-annealed YCMO samples. Multiple dielectric relaxations are observed in all the annealed YCMO and YNMO samples.
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Exchange bias behavior in Ni-Mn-Sb Heusler alloys
TL;DR: In this article, the authors reported the observation of exchange bias in bulk polycrystalline Ni50Mn25+xSb25−x Heusler alloys and attributed it to the coexistence of antiferromagnetic and ferromagnetic exchange interactions in the system.
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Observation of exchange bias in the martensitic state of Ni50Mn36Sn14 Heusler alloy
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