Exchange bias and spin-phonon coupling in complex glassy layered perovskite SrLaMn0.5Ni0.5O4

In the present work, single-layered polycrystalline Ruddlesden-Popper oxide, SrLaMn0.5Ni0.5O4 (SLMNO) has been synthesized and characterized. X-ray diffraction and Raman spectroscopy revealed tetragonal crystal structure (I4/mmm) with lattice parameters of a = b = 3.8388 (4) A and c =12.5593 (2) A. XPS analysis confirms Mn4+/Ni2+ as the major valance state in SLMNO. Temperature evolution of dc magnetization suggests a ferromagnetic ordering below 130 K followed by a glassy like behaviour below 13 K. The ac susceptibility measurement corroborates the dc magnetization data and confirms cluster glass behavior at lower temperatures. Interestingly, SLMNO exhibits a negative exchange bias of ∼ 0.075 kOe at 5 K under field cooling of 50 kOe and also shows the existence of spin-phonon coupling.

[1]  K. Wissel,et al.  Topochemical Fluorination of La2NiO4+d: Unprecedented Ordering of Oxide and Fluoride Ions in La2NiO3F2. , 2018, Inorganic chemistry.

[2]  Q. Ma,et al.  Heterogeneous Reaction of SO2 on Manganese Oxides: the Effect of Crystal Structure and Relative Humidity , 2017, Scientific Reports.

[3]  A. Feldhoff,et al.  A new CO2-resistant Ruddlesden–Popper oxide with superior oxygen transport: A-site deficient (Pr0.9La0.1)1.9(Ni0.74Cu0.21Ga0.05)O4+δ , 2015 .

[4]  C. Meneghini,et al.  Formation of two-dimensional ordered nanodomains and curious properties of Sr3FeMoO7 , 2015 .

[5]  A. Cammarata,et al.  Ferroelectricity from coupled cooperative Jahn-Teller distortions and octahedral rotations in ordered Ruddlesden-Popper manganates , 2015 .

[6]  J. Mydosh,et al.  Spin glasses: redux: an updated experimental/materials survey , 2015, Reports on progress in physics. Physical Society.

[7]  T. Chatterji,et al.  Antisite disorder-induced exchange bias effect in multiferroic Y2CoMnO6 , 2015, 1501.01766.

[8]  R. F. Jardim,et al.  Raman scattering in the magnetically frustrated double perovskite Sr2YRuO6 , 2014 .

[9]  Shiming Zhou,et al.  Near room-temperature magnetoresistance effect in double perovskite La2NiMnO6 , 2013 .

[10]  D. K. Mishra,et al.  Signature of spin-phonon coupling in Sr2CoO4 thin film: A Raman spectroscopic study , 2013 .

[11]  He Tian,et al.  Artificial Construction of the Layered Ruddlesden–Popper Manganite La2Sr2Mn3O10 by Reflection High Energy Electron Diffraction Monitored Pulsed Laser Deposition , 2012, Journal of the American Chemical Society.

[12]  P. Fournier,et al.  Growth, magnetic properties and Raman scattering of La2NiMnO6 single crystals , 2009, 0905.0202.

[13]  S. Das,et al.  Electrical transport properties and magnetic cluster glass behavior of Nd0.7Sr0.3MnO3 nanoparticles , 2006 .

[14]  S. Cheong,et al.  Incommensurate charge stripe ordering in La{sub 2-x}Sr{sub x}NiO{sub 4} for x=(0.33,0.30,0.275) , 2004 .

[15]  J. Goodenough,et al.  Oxygen stoichiometry, ferromagnetism, and transport properties of La 2-x NiMnO 6+δ , 2003 .

[16]  I. Torriani,et al.  Magnetic ordering effects in the Raman spectra of La 1-x Mn 1-x O 3 , 1999 .

[17]  Sunghyun Kim,et al.  Syntheses and Magnetic Properties of Layered LnSrMn0.5Ni0.5O4 (Ln = La, Pr, Nd, Sm, Gd) Compounds , 1999 .

[18]  M. Balkanski,et al.  Anharmonic effects in light scattering due to optical phonons in silicon , 1983 .

[19]  J. Goodenough,et al.  Some Magnetic and Crystallographic Properties of the System LaMn1−xNixO3+λ , 1958 .

[20]  S. N. Ruddlesden,et al.  New compounds of the K2NIF4 type , 1957 .

[21]  J. E. Millburn,et al.  LaSrMn0.5Ni0.5O4+δ: spin and oxidation state in the K2NiF4 structure , 1998 .