Dynamic spin correlations in the frustrated cubic phase of MnV_2O_4

Jae-Ho Chung; Young-Sang Song; J.-H. Kim; T. Suzuki; T. Katsufuji; M. Matsuda; S.-H. Lee

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Dynamic spin correlations in the frustrated cubic phase of MnV_2O_4

机译：MnV_2O_4失意立方相中的动态自旋相关性

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摘要

The ferrimagnetic spinel MnV_2O_4 undergoes an orbital-induced cubic-to-tetragonal distortion at T_(YK) ＝ 58 K, below which noncollinear commensurate ferrimagnetic ordering occurs. Using inelastic neutron scattering, we investigated low-energy dynamics in its cubic phase above T_(YK). We observed two types of coexisting short-range magnetic excitations: the dispersive spin waves centered around the Brillouin-zone centers, k_0 ＝ (0, 0, 0), and quasielastic spin fluctuations centered at incommensurate wave vectors, k_(incom) ＝ (ξ. ξ, 0). The coexistence of the two distinct features can be understood as a dynamic realization of the conical spiral order observed in cubic spinels such as CoCr_2O_4.

机译：亚铁尖晶石MnV_2O_4在T_（YK）＝ 58 K时经历轨道诱导的立方到四方畸变，在此以下发生非共线的相应亚铁磁排序。使用非弹性中子散射，我们研究了在T_（YK）以上的立方相中的低能动力学。我们观察到两种共存的短程磁激发：弥散自旋波以布里渊区中心为中心，k_0 ＝（0，0，0），以及准弹性自旋涨落以不相称的波矢量k_（incom）＝（ ξ。ξ，0）。这两个不同特征的共存可以理解为在立方尖晶石（例如CoCr_2O_4）中观察到的锥形螺旋顺序的动态实现。

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来源
《Physical review》 |2013年第9期|094430.1-094430.6|共6页
作者
Jae-Ho Chung; Young-Sang Song; J.-H. Kim; T. Suzuki; T. Katsufuji; M. Matsuda; S.-H. Lee;
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作者单位

Department of Physics, Korea University, Seoul 136-713, Korea;

Department of Physics, Korea University, Seoul 136-713, Korea;

Max-Planck-Institut fur Festkoerperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany,Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA;

Department of Physics, Waseda University, Tokyo 169-8555, Japan;

Department of Physics, Waseda University, Tokyo 169-8555, Japan;

Quantum Condensed Matter Division, Oak Ridge National Laboratory, OakRidge, Tennessee 37831-6393, USA;

Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA;

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正文语种 eng
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关键词
dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.); neutron inelastic scattering; ferrimagnetics;

机译：动态特性（动态磁化率;自旋波;自旋扩散;动态缩放等）;中子非弹性散射;铁磁;

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2. Zero Temperature Phases of the Frustrated J₁–J₂ Antiferromagnetic Spin-1/2 Heisenberg Model on a Simple Cubic Lattice [J] . Kingshuk Majumdar, Trinanjan Datta Journal of Statistical Physics . 2010,第4期

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4. Structural, magnetic and electronic properties of ferrimagnetic and non-magnetic cubic phase of MnV_2O_4 [C] . Hardik L. Kagdada, Anjali Patel, Prafulla K. Jha DAE Solid State Physics Symposium . 2019

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5. Spin dynamics of density wave and frustrated spin systems probed by nuclear magnetic resonance. [D] . Lumata, Lloyd L. 2008

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6. Spin-stripe phase in a frustrated zigzag spin-1/2 chain [O] . M. Pregelj, A. Zorko, O. Zaharko, -1

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7. Zero temperature phases of the frustrated J1-J2 antiferromagnetic spin-1/2 Heisenberg model on a simple cubic lattice [O] . Majumdar, Kingshuk, Datta, Trinanjan 2009

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Dynamic spin correlations in the frustrated cubic phase of MnV_2O_4

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