Special Issue on Quantum Spin Ice and Liquid in Geometrically Frustrated Magnets; Guest Editors: Ying-Jer Kao (National Taiwan University), Shigeki Onoda (RIKEN, Japan) and Satoru Nakatsuji (University of Tokyo, Japan)No Access

First-Order Ferromagnetic Transition of Quantum Spin Ice System Yb₂Ti₂O₇

Yukio Yasui

Department of Physics, Meiji University, Higashi-mita, Tamaku, Kawasaki 214-8571, Japan

Corresponding author.

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Noriaki Hamachi

Department of Physics, Meiji University, Higashi-mita, Tamaku, Kawasaki 214-8571, Japan

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Yohei Kono

Institute for Solid State Physics, The University of Tokyo, Chiba 277-8581, Japan

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Shunichiro Kittaka

Institute for Solid State Physics, The University of Tokyo, Chiba 277-8581, Japan

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, and

Toshiro Sakakibara

Institute for Solid State Physics, The University of Tokyo, Chiba 277-8581, Japan

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https://doi.org/10.1142/S2010324715400020Cited by:2 (Source: Crossref)

Abstract

The neutron diffraction and measurements of specific heat and magnetization were carried out on single crystals of a quantum spin ice system Yb₂Ti₂O₇. The thermal hysteresis loops of temperature dependence of the magnetization and neutron diffraction intensity indicate a first-order ferromagnetic transition, where the used single crystals are confirmed to have a sharp peak structure in the specific heat (C)–temperature (T) curve at T_C ∼ 0.2 K. The magnetic structure analysis of neutron diffraction results revealed that the Yb³⁺ moments have a ferromagnetic collinear structure along [001] directions with ordered moment value 1.1 ± 0.1 μ_B at 0.03 K. The mechanism of ferromagnetic transition of Yb₂Ti₂O₇ will be discussed.

Keywords:

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