Single-ion anisotropy in the gadolinium pyrochlores studied by an electron paramagnetic resonance

A. I. Smirnov; A. Loidl; C. Marin; H.-A. Krug von Nidda; J.-P. Sanchez; M. E. Zhitomirsky; V. N. Glazkov

arxiv: cond-mat/0507413 · v1 · submitted 2005-07-18 · ❄️ cond-mat.str-el

Single-ion anisotropy in the gadolinium pyrochlores studied by an electron paramagnetic resonance

V. N. Glazkov , M. E. Zhitomirsky , A. I. Smirnov , H.-A. Krug von Nidda , A. Loidl , C. Marin , J.-P. Sanchez This is my paper

classification ❄️ cond-mat.str-el

keywords anisotropyeasy-planeelectronparamagneticpyrochloreresonancesingle-ionantiferromagnet

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The electron paramagnetic resonance is used to measure the single-ion anisotropy of Gd3+ ions in the pyrochlore structure of (Y{1-x}Gdx)2Ti2O7. A rather strong easy-plane type anisotropy is found. The anisotropy constant D is comparable to the exchange integral J in the prototype Gd2Ti2O7, D~0.75J and exceeds the dipolar energy scale. Physical implications of an easy-plane anisotropy for a pyrochlore antiferromagnet are considered. We calculate the magnetization curves at T=0 and discuss phase transitions in magnetic field.

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Single-ion anisotropy in the gadolinium pyrochlores studied by an electron paramagnetic resonance

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