Magnetostructural phase transition and magnetocaloric effect in off-stoichiometric Mn1.9-xNixGe alloys

Zhang, C. L.; Wang, D. H.; Cao, Q. Q.; Han, Z. D.; Xuan, H. C.; Du, Y. W.
September 2008
Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p122505
Academic Journal
Phase transitions and magnetic entropy changes are studied in Mn1.9-xNixGe (x=0.85, 0.855) alloys. In these off-stoichiometric alloys, the crystallographic transition temperature decreases remarkably due to the deficiency of transition-metal atoms, and, consequently, a magnetostructural transition from the antiferromagnetic TiNiSi-type structure to the ferromagnetic Ni2In-type structure is observed. Owing to the abrupt change in magnetization, large magnetic entropy changes are obtained. The effect of transition-metal vacancies on the phase transition temperature is discussed.


Related Articles

  • Effect of Pressure on Magnetic Properties of (NH3OH)2CoF4 Fluoro-Metal Complex. Jagličić, Z.; Zentková, M.; Mihalik, M.; Drofenik, M.; Kristl, M.; Dojer, B.; Kasunič, M.; Golobič, A.; Jagodič, M.; Arnold, Z. // Acta Physica Polonica, A.;Nov2010, Vol. 118 Issue 5, p1074 

    Effect of pressure on magnetic properties of a bulk fluoro-metal complex (NH3OH)2MF4 was studied. Magnetization measurements suggest that a ferromagnetic transition at TC1 = 47 K is followed by a ferrimagnetic one at TC2 = 3 K. Both transition temperatures are pressure dependent with the...

  • Magnetism of crystalline and amorphous La0.67Ca0.33MnO3 nanoparticles. Bhowmik, R. N.; Poddar, Asok; Ranganathan, R.; Mazumdar, Chandan // Journal of Applied Physics;Jun2009, Vol. 105 Issue 11, p113909 

    We report the ferromagnetism of La0.67Ca0.33MnO3 in bulk polycrystalline, nanocrystalline, and amorphous phases. The structural change from crystalline phase to amorphous phase exhibited a systematic decrease in TC (paramagnetic to ferromagnetic transition temperature) and spontaneous...

  • Magnetocaloric Effet in NdNi4Si Compound. Falkowski, M.; Toliński, T.; Kowalczyk, A. // Acta Physica Polonica, A.;May/Jun2012, Vol. 121 Issue 5/6, p1290 

    On the basis of the thermodynamic approach, we report the magnetocaloric properties of the ternary ferromagnetic NdNi4Si compound with magnetic phase transition temperature TC at 8 K. The saturated magnetic moment in H = 9 T is equal to 1.5 μB/f.u. at 4.2 K and the compound crystallizes in...

  • Complex ferromagnetic-antiferromagnetic phase transition and glass-like arrest of kinetics in Sm1-xBaxCrO3 (x=0 and 0.1). Qian, X. L.; Deng, D. M.; Jin, Y.; Lu, B.; Cao, S. X.; Zhang, J. C. // Journal of Applied Physics;2014, Vol. 115 Issue 19, p193902-1 

    The dc magnetization studies of polycrystalline sample Sm1-xBaxCrO3 (x=0 and 0.1) show the existence of a magnetic glass-like arrest of kinetics. There exist constant frozen fractions of antiferromagnetic state in this complex phase transition process, the frozen fractions are about 33% and 17%,...

  • Anisotropic magnetic phase diagrams of HoB4 single crystal. Kim, J. Y.; Cho, B. K.; Han, S. H. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07E116 

    We have investigated the magnetic and electronic properties of a single-crystal HoB4. Antiferromagneticlike transitions were revealed by the temperature-dependent magnetization exhibiting two transition temperatures at TN1=7.1 K and TN2=5.7 K for an applied magnetic field along the c-axis, and...

  • Magnetic Phase Transitions in the Iron-Doped Pr[sub 0.7]Ca[sub 0.3]Mn[sub 1 — y]Fe[sub y]O[sub 3] Manganites at High Pressures. Kozlenko, D.P.; Voronin, V.I.; Glazko, V.P.; Medvedeva, I.V.; Savenko, B.N. // Physics of the Solid State;Mar2004, Vol. 46 Issue 3, p484 

    The atomic and magnetic structures of the iron-doped Pr[sub 0.7]Ca[sub 0.3]Mn[sub 1 – y]Fe[sub y]O[sub 3] manganites (y = 0, 0.1) have been studied at high pressures of up to 4 GPa in the temperature range 16–300 K. At normal pressure, Pr[sub 0.7]Ca[sub 0.3]MnO[sub 3] undergoes a...

  • Thermal entanglement of two interacting qubits in a static magnetic field. Lagmago Kamta, G.; Istomin, A. Y.; Starace, A. F. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Nov2007, Vol. 45 Issue 2, p389 

    We study systematically the entanglement of a two-qubit Heisenberg XY model in thermal equilibrium in the presence of an external arbitrarily-directed static magnetic field, thereby generalizing our prior work [G. Lagmago Kamta, A.F. Starace, Phys. Rev. Lett. 88, 107901 (2002)]. We show that a...

  • 57Fe Mössbauer study of first-order phase transition in LaVO3. Yoon, Sunghyun // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07D509 

    Nature of phase transition in polycrystalline LaVO3 has been studied using Mössbauer spectroscopy with 1% 57Fe doped sample. Magnetic susceptibility of sample taken upon both field cooled and zero-field cooled exhibited a peak at TN∼137 K, indicative of antiferromagnetic-paramagnetic...

  • Magnetism and cluster glass dynamics in geometrically frustrated LuFe2O4. Phan, M. H.; Frey, N. A.; Srikanth, H.; Angst, M.; Sales, B. C.; Mandrus, D. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07E308 

    We report on the magnetic properties of high quality LuFe2O4 single crystals grown by the floating zone method. dc and ac susceptibility measurements and analysis reveal a ferrimagnetic transition at ∼240 K followed by a re-entrant cluster glass transition below 225 K, with an additional...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics