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The local magnetic anisotropy of a typical crystalline compound is usually attributed to the combined effect of crystal electric fields and spin-orbit coupling. We show that this simple local picture is transformed in heavy-fermion…

Strongly Correlated Electrons · Physics 2025-08-05 Ewan Scott , Michal Kwasigroch

We study the magnetisation dynamics of a bulk single crystal Cr$_2$Ge$_2$Te$_6$ (CGT), by means of broadband ferromagnetic resonance (FMR), for temperatures from 60 K down to 2 K. We determine the Kittel relations of the fundamental FMR…

Materials Science · Physics 2019-11-05 S. Khan , C. W. Zollitsch , D. M. Arroo , H. Cheng , I. Verzhbitskiy , A. Sud , Y. P. Feng , G. Eda , H. Kurebayashi

Field variation of heat capacity at fixed temperatures is investigated to identify the origin of the field induced first order phase transition in polycrystalline Ce(Fe$_{0.094}$Al$_{0.04}$)$_2$ sample. The heat capacity at 4.5K and 3.5K…

Strongly Correlated Electrons · Physics 2007-05-23 L. S. Sharath Chandra , Kaustav Mukherjee , V. Ganesan , A. Banerjee , P. Chaddah , M. K. Chattopadhyay , S. B. Roy

In this study we examine the phase transitions in single crystals of [(CH3)2NH2]Co(HCOO)3], using magnetization and specific heat measurements as a function of temperature and magnetic field. Magnetisation measurements indicate a transition…

Materials Science · Physics 2015-01-28 K. Vinod , C. S. Deepak , Shilpam Sharma , D. Sornadurai , C. S. Sundar , A. Bharathi

Co3Sn2S2 has generated a growing interest as a rare example of the highly uniaxial anisotropic kagome ferromagnet showing a combination of frustrated-lattice magnetism and topology. Recently, via precise measurements of the magnetization…

Strongly Correlated Electrons · Physics 2020-11-23 Mohamed A. Kassem , Yoshikazu Tabata , Takeshi Waki , Hiroyuki Nakamura

From a systematic study of the electrical resistivity $\rho(T,H)$, magnetic susceptibility $\chi(T,H)$, isothermal magnetization $M(H)$ and the specific heat $C(T,H)$, a temperature-magnetic field ($T$-$H$) phase diagram has been…

Strongly Correlated Electrons · Physics 2015-03-04 T. Shang , Y. H. Chen , F. Ronning , N. Cornell , J. D. Thompson , A. Zakhidov , M. B. Salamon , H. Q. Yuan

The magnetization behaviour of the soft Cobalt Ferrite-hard Strontium Ferrite nanocomposite is tuned from the non exchange spring nature to the exchange spring nature, by controlling the particle size of the soft Cobalt Ferrite in the…

Materials Science · Physics 2015-06-15 Debangsu Roy , Sreenivasulu K , P S Anil Kumar

Realizing a quantum critical point (QCP) in clean ferromagnetic (FM) metals has remained elusive due to the coupling of magnetization to the electronic soft modes that drive the transition to be of first order. However, by introducing a…

Strongly Correlated Electrons · Physics 2025-03-04 H. K. Dara , S. S. Islam , A. Magar , D. Patra , H. Luetkens , T. Shiroka , R. Nath , D. Samal

We measured the in-plane resistivity anisotropy in the underdoped Ca$_{1-x}$Na$_x$Fe$_2$As$_2$ single crystals. The anisotropy (indicated by $\rho_{\rm b} - \rho_{\rm a}$) appears below a temperature well above magnetic transition…

Superconductivity · Physics 2014-05-27 J. Q. Ma , X. G. Luo , P. Cheng , N. Zhu , D. Y. Liu , F. Chen , J. J. Ying , A. F. Wang , X. F. Lu , B. Lei , X. H. Chen

We report the in-plane resistivity and magnetic susceptibility of the layered cobalt oxide Na$_{0.35}$CoO$_{2}{\cdot}1.3$H$_{2}$O single crystal. The temperature dependence of the resistivity shows metallic behavior from room temperature to…

We report a systematic investigation of anisotropic magnetocaloric effects in single crystal Cr$_2$Te$_3$. Single crystal samples are synthesized by chemical vapor transport and characterized by x-ray and Laue diffraction methods. The…

Materials Science · Physics 2023-12-05 Anirban Goswami , Nicholas Ng , AM Milinda Abeykoon , Emmanuel Yakubu , Samaresh Guchhait

One of the possible approaches to decrease the demand for critical elements such as rare earths is to develop new sustainable magnets. Iron-based materials are suitable for gap magnets applications since iron is the most abundant…

A detailed investigation of first order ferrimagnetic (FRI) to antiferromagnetic (AFM) transition in Co (15%) doped $Mn_2Sb$ is carried out. These measurements demonstrate anomalous thermomagnetic irreversibility and glass-like frozen FRI…

Strongly Correlated Electrons · Physics 2007-12-18 Pallavi Kushwaha , R Rawat , P Chaddah

In intercalated transition metal dichalcogenide $Fe_xTaS_2$ (0.2 $\leq$ x $\leq$ 0.4) single crystals, large magnetic anisotropy is observed. Transport property measurements indicate that heavy Fe-doping leads to a large anisotropy of…

Strongly Correlated Electrons · Physics 2017-05-10 G. Wu , B. L. Kang , Y. L. Li , T. Wu , N. Z. Wang , X. G. Luo , Z. Sun , L. J. Zou , X. H. Chen

We have investigated the temperature and magnetic field dependence of magnetization, specific heat ($C_p$), and relative sample length change ($\Delta L/L_0$) for understanding the field-induced spin-structural change in…

Strongly Correlated Electrons · Physics 2014-01-07 M. Nandi , N. Khan , D. Bhoi , A. Midya , P. Mandal

Very sharp magnetization step is observed across the field induced antiferromagnetic to ferromagnetic transition in various doped-CeFe$_2$ alloys, when the measurement is performed below 5K. In the higher temperature regime (T$>$5K) this…

Materials Science · Physics 2009-11-11 S. B. Roy , M. K. Chattopadhyay , P. Chaddah , A. K. Nigam

Magnetic moments intercalated into layered transition metal dichalcogenides are an excellent system for investigating the rich physics associated with magnetic ordering in a strongly anisotropic, strong spin-orbit coupling environment. We…

Strongly Correlated Electrons · Physics 2015-04-08 Will J. Hardy , Chih-Wei Chen , A. Marcinkova , Heng Ji , Jairo Sinova , D. Natelson , E. Morosan

We apply the first-order reversal curve (FORC) method, borrowed from studies of ferromagnetic materials, to the magneto-structural phase transition of FeTe. FORC measurements reveal two features in the hysteretic phase transition, even in…

Strongly Correlated Electrons · Physics 2017-06-28 M. K. Frampton , J. Crocker , D. A. Gilbert , N. Curro , Kai Liu , J. A. Schneeloch , G. D. Gu , R. J. Zieve

We report on transport properties of millimetric super-lattices of CoFe nanoparticles surrounded by organic ligands. R(T)s follow R(T) = R_0.exp(T/T_0)^0.5 with T_0 ranging from 13 to 256 K. At low temperature I(V)s follow…

Materials Science · Physics 2015-05-13 R. P. Tan , J. Carrey , C. Desvaux , L. -M. Lacroix , P. Renaud , B. Chaudret , M. Respaud

The quantum magnet NiCl$_2$-4SC(NH$_2$)$_2$ is a candidate for observing Bose-Einstein Condensation of spin degrees of freedom in applied magnetic fields. An XY antiferromagnetic ordered state occurs in a dome-shaped region of the…

Strongly Correlated Electrons · Physics 2009-11-11 V. S. Zapf , V. F. Correa , C. D. Batista , T. P. Murphy , E. D. Palm , M. Jaime , S. Tozer , A. Lacerda , A. Paduan-Filho