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We report detailed measurements of the low temperature magnetic phase diagram of Er$_2$Ti$_2$O$_7$. Heat capacity and time-of-flight neutron scattering studies of single crystals, subject to magnetic fields applied along the…

Strongly Correlated Electrons · Physics 2012-07-16 J. P. C. Ruff , J. P. Clancy , A. Bourque , M. A. White , M. Ramazanoglu , J. S. Gardner , Y. Qiu , J. R. D. Copley , H. A. Dabkowska , B. D. Gaulin

Physical properties of a pyrohafnate compound Pr2Hf2O7 have been investigated by ac magnetic susceptibility \chi_ ac(T), dc magnetic susceptibility \chi(T), isothermal magnetization M(H) and heat capacity C_p(T) measurements on…

Strong electronic interactions and spin orbit coupling can be conducive for realizing novel broken symmetry phases supporting quasiparticles with nontrivial band topology. 227 pyrochlore iridates provide a suitable material platform for…

Strongly Correlated Electrons · Physics 2017-02-22 Pallab Goswami , Bitan Roy , Sankar Das Sarma

Magnetic and magnetotransport properties of oriented polycrystalline Pr0.58Ca0.42MnO3 thin films prepared in flowing oxygen and air ambient has been investigated. The magnetic ground state of both the films is a frozen cluster glass. In the…

Materials Science · Physics 2014-08-14 Vasudha Agarwal , P. K. Siwach , G. D. Varma , V. P. S. Awana , A. K. Srivastava , H. K. Singh

We have investigated the effect of Cu substitution in Eu2(Ir1-xCux)2O7 with the help of magnetic and transport property measurements. XPS measurement reveals that each Cu2+ converts Ir4+ to double amount of Ir5+ ions. The metal-insulator…

Strongly Correlated Electrons · Physics 2022-04-20 Sampad Mondal , M. Modak , B. Maji , Swapan K. Mandal , B. Ghosh , Surajit Saha , M. Sardar , S. Banerjee

We report magnetization data for several titanium pyrochlore systems measured down to 0.5 K. The measurements, performed on single crystal samples in fields of up to 7 T, have captured the essential elements of the previously reported phase…

Strongly Correlated Electrons · Physics 2014-08-18 O. A. Petrenko , M. R. Lees , G. Balakrishnan

The influence of positive and negative chemical pressure on the magnetic behavior of the compound, Ce2RhSi3, crystallizing in a AlB2-derived hexagonal structure and ordering antiferromagnetically around (TN = 7 K), is investigated by…

Materials Science · Physics 2007-05-23 Kausik Sengupta , S. Rayaprol , E. V. Sampathkumaran

We report study of magnetization, resistivity, magnetoresistance and specific heat of the pyrochlore Iridate (Eu1-xNdx)2Ir2O7 with x=0.0, 0.5 and 1.0, where spin orbit coupling, electronic correlation, magnetic frustration and Kondo…

Strongly Correlated Electrons · Physics 2020-12-02 Sampad Mondal , M. Modak , B. Maji , M. K. Ray , S. Mandal , Swapan K. Mandal , M. Sardar , S. Banerjee

We present an experimental study of the pyrochlore coumpound Nd2Zr2O7 by means of neutron scattering and magnetization measurements down to 90 mK. The Nd$^{3+}$ magnetic moments exhibit a strong local $\langle$111$\rangle$ Ising anisotropy…

Strongly Correlated Electrons · Physics 2016-01-05 E. Lhotel , S. Petit , S. Guitteny , O. Florea , M. Ciomaga Hatnean , C. Colin , E. Ressouche , M. R. Lees , G. Balakrishnan

Crystal structure, electronic state of Ir$^{4+}$, and magnetic properties of the antifluorite compound K$_2$IrBr$_6$ are studied using high-resolution synchrotron x-ray diffraction, resonant inelastic x-ray scattering (RIXS), thermodynamic…

Strongly Correlated Electrons · Physics 2021-04-02 Nazir Khan , Danil Prishchenko , Mary H. Upton , Vladimir G. Mazurenko , Alexander A. Tsirlin

Weyl semimetals are three dimensional analogs of graphene where the energy of the excitations are a linear function of their momentum. Pyrochlore Iridates $(A_{2}Ir_{2}O_{7})$ with A =yttrium or lanthanide element) are conjectured to be…

Strongly Correlated Electrons · Physics 2015-05-30 Vivek Aji

Tb2Ti2O7, a pyrochlore system, has garnered significant interest due to its intriguing structural and physical properties and their dependence on external physical parameters. In this study, utilizing high-brilliance synchrotron X-ray…

The competition between interactions in frustrated magnets allows a wide variety of new ground states, often exhibiting emergent physics and unique excitations. Expanding the suite of lattices available for study enhances our chances of…

Strongly Correlated Electrons · Physics 2017-01-24 Darren C. Peets , Hasung Sim , Seongil Choi , Maxim Avdeev , Seongsu Lee , Su Jae Kim , Hoju Kang , Docheon Ahn , Je-Geun Park

We report a systematical structural, transport and magnetic study of Ca or Ba doped Sr2IrO4single crystals. Isoelectronically substituting Ca2+ (up to 15%) or Ba2+ (up to 4%) ion for the Sr2+ ion provides no additional charge carriers but…

Strongly Correlated Electrons · Physics 2018-05-04 H. D. Zhao , J. Terzic , H. Zheng , Y. F. Ni , Y. Zhang , Feng Ye , P. Schlottmann , G. Cao

We report measurements performed on a polycrystalline sample of the pyrochlore compound Nd2Sn2O7. It undergoes a second order magnetic phase transition at Tc ~ 0.91 K to a noncoplanar all-in-all-out magnetic structure of the Nd3+ magnetic…

Strongly Correlated Electrons · Physics 2015-11-04 A. Bertin , P. Dalmas de Reotier , B. Fak , C. Marin , A. Yaouanc , A. Forget , D. Sheptyakov , B. Frick , C. Ritter , A. Amato , C. Baines , P. J. C. King

In this work we study the interplay between the crystal structure and magnetism of the pyroarsenate \alpha-Cu_2As_2O_7 by means of magnetization, heat capacity, electron spin resonance and nuclear magnetic resonance measurements as well as…

We have measured resistivity as a function of temperature and pressure of Ti4O7 twinned crystals using different contact configurations. Pressures over 4kbar depress the localization of bipolarons and allow the study of the electrical…

Strongly Correlated Electrons · Physics 2009-11-10 C. Acha , M. Monteverde , M. Nunez-Regueiro , A. Kuhn , M. A. Alario Franco

Pronounced anisotropy of magnetic properties and complex magnetic order of a new oxi-halide compound Co7(TeO3)4Br6 has been investigated by powder and single crystal neutron diffraction, magnetization and ac susceptibility techniques.…

Materials Science · Physics 2013-05-29 M. Prester , I. Zivkovic , O. Zaharko , D. Pajic , P. Tregenna-Piggott , H. Berger

LuFe$_4$Ge$_2$ crystallizes in the ZrFe$_4$Si$_2$-type structure, hosting chains of Fe-tetrahedra giving rise to geometric frustration and low-dimensionality. The compound orders antiferromagnetically at around 36 K accompanied by a…

Rare-earth (RE) based frustrated magnets as typical systems of combining strong spin-orbit coupling, geometric frustration and anisotropic exchange interactions, can give rise to diverse exotic magnetic ground states such as quantum spin…

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