Competing ferri- and antiferromagnetic phases in geometrically frustrated LuFe2O4.

نویسندگان

  • J de Groot
  • K Marty
  • M D Lumsden
  • A D Christianson
  • S E Nagler
  • S Adiga
  • W J H Borghols
  • K Schmalzl
  • Z Yamani
  • S R Bland
  • R de Souza
  • U Staub
  • W Schweika
  • Y Su
  • M Angst
چکیده

We present a detailed study of magnetism in LuFe(2)O(4), combining magnetization measurements with neutron and soft x-ray diffraction. The magnetic phase diagram in the vicinity of T(N) involves a metamagnetic transition separating an antiferro- and a ferrimagnetic phase. For both phases the spin structure is refined by neutron diffraction. Observed diffuse magnetic scattering far above T(N) is explained in terms of near degeneracy of the magnetic phases.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Exotic phases in geometrically frustrated triangular Ising magnets

We report a systematic study of both quantum and classical geometrically frustrated Ising models with competing ordering mechanism. The ordering comes in the classical case from a coupling of two-dimensional (2D) layers and in the quantum model from the quantum dynamics induced by a transverse field. We develop a microscopic derivation of the Landau–Ginzburg–Wilson (LGW) Hamiltonian for these m...

متن کامل

Antiferromagnetic Metal and Mott Transition on Shastry-Sutherland Lattice

The Shastry-Sutherland lattice, one of the simplest systems with geometrical frustration, which has an exact eigenstate by putting singlets on diagonal bonds, can be realized in a group of layered compounds and raises both theoretical and experimental interest. Most of the previous studies on the Shastry-Sutherland lattice are focusing on the Heisenberg model. Here we opt for the Hubbard model ...

متن کامل

The Magnetic Correlations and Fluctuations in the Geometrically Frustrated Antiferromagnetic Spinel CdCr2O4: An Experiment Using the SPINS Triple-Axis Spectrometer Summer School on Methods and Applications of Neutron Spectroscopy NIST Center for Neutron Research

We will study the magnetic correlations in the geometrically frustrated antiferromagnetic spinel CdCr2O4 using inelastic neutron scattering. In so doing, we will gain an an understanding of the principles of Triple-Axis Spectroscopy (TAS) and learn how to analyze the TAS data obtained to extract physical information about the system being studied.

متن کامل

Spin-phonon coupling in antiferromagnetic chromium spinels

The temperature dependence of eigenfrequencies and intensities of the IR active modes has been investigated for the antiferromagnetic chromium spinel compounds CdCr2O4, ZnCr2O4, ZnCr2S4, ZnCr2Se4, and HgCr2S4 by IR spectroscopy for temperatures from 5 K to 300 K. At the transition into the magnetically ordered phases, and driven by spin-phonon coupling, most compounds reveal significant splitti...

متن کامل

Competing spin phases in geometrically frustrated magnetic molecules.

We identify a class of zero-dimensional classical and quantum Heisenberg spin systems exhibiting anomalous behavior in an external magnetic field B similar to that found for the geometrically frustrated kagome lattice of classical spins. Our calculations for the isotropic Heisenberg model show the emergence of a pronounced minimum in the differential susceptibility dM/dB at B(sat)/3 as the temp...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review letters

دوره 108 3  شماره 

صفحات  -

تاریخ انتشار 2012