Giant magnetocaloric effect in Gd2NiMnO6 and Gd2CoMnO6 ferromagnetic insulators

We have investigated magnetocaloric effect in double perovskite Gd2NiMnO6 (GNMO) and Gd2CoMnO6 (GCMO) samples by magnetic and heat capacity measurements. Ferromagnetic ordering is observed at ~130 K (~112 K) in GNMO (GCMO), while the Gd exchange interactions seem to dominate for T < 20 K. In GCMO, below 50 K, an antiferromagnetic behaviour due to 3d-4f exchnage interaction is observed. A maximum entropy (-{\Delta}SM) and adiabatic temperature change of ~35.5 J Kg-1 K-1 (~24 J Kg-1 K-1) and 10.5 K (6.5 K) is observed in GNMO (GCMO) for a magnetic field change of 7 T at low temperatures. Absence of magnetic and thermal hysteresis and their insulating nature make them promising for low temperature magnetic refrigeration

Tetramer Orbital-Ordering induced Lattice-Chirality in Ferrimagnetic, Polar MnTi2O4

Using density-functional theory calculations and experimental investigations on structural, magnetic and dielectric properties, we have elucidated a unique tetragonal ground state for MnTi2O4, a Ti^{3+} (3d^1)-ion containing spinel-oxide. With lowering of temperature around 164 K, cubic MnTi2O4 undergoes a structural transition into a polar P4_1 tetragonal structure and at further lower temperatures, around 45 K, the system undergoes a paramagnetic to ferrimagnetic transition. Magnetic superexchange interactions involving Mn and Ti spins and minimization of strain energy associated with co-operative Jahn-Teller distortions plays a critical role in stabilization of the unique tetramer-orbital ordered ground state which further gives rise to lattice chirality through subtle Ti-Ti bond-length modulations

Still ACTing UP? Voices from ACTUP\u27s Oral History Project on the Current State of the LGBTQ Community

Examination of the ACTUP Oral History Project using assimilation and activist identity theories reveals activists’ questionable presumptions about LGBTQ marriage, conflations of LGBTQ and activist identities, and nostalgia. Findings suggest a transformation from counterculture to assimilated subculture via segmented assimilation in which advantaged cohorts assimilate while others do not

Alleviating Poverty and Malnutrition in Agro-biodiversity Hotspots: Baseline Report

The Alleviating Poverty and Malnutrition in Agrobiodiversity Hotspots (APM) project, jointly designed and implemented by the M.S. Swaminathan Research Foundation (MSSRF) and the Faculty of Agriculture, Life, and Environmental Sciences at the University of Alberta (U of A), aims to address the disparity between richness in agro-biodiversity and severe poverty in three selected agro-biodiversity hotspots in rural India. The project aims to co-design, implement and assess innovative strategies to enhance bio-diverse agriculture, while improving nutrition. Participatory research is conducted with local farmers and community organizations in three project locations in Tamil Nadu (Kolli Hills), Kerala (Wayanad) and Odisha (Koraput). This report summarizes the baseline situation in the three locations, using secondary data, data from a survey of 3,845 rural households, and information from key informant interviews. The survey shows minorities of households to be general / forward caste, with various mixes of backward / scheduled castes or scheduled tribes. Farming was the main source of livelihood for 56.7% and 91.1% of households across the three sites. Survey results are also reported for land ownership, farm size, crop cultivation, crop mix, home garden cultivation, livestock production, asset ownership, migration, finance, and information sources. The key informant revealed the availability of a wide variety of government programs related to poverty alleviation, health, agriculture, horticulture, livestock, nutrition, education, fishery and finance in all three areas