Magnetoelastics of High Field Phenomena in Antiferromagnets UO2 and CeRhIn5

Abstract

We use a recently developed optical fiber Bragg grating technique, in continuous and pulsed magnetic fields in excess of 90T, to study magnetoelastic correlations in magnetic materials at cryogenic temperatures. Both insulating UO2 and metallic CeRhIn5 present antiferromagnetic ground states, at T_N = 30.3K and T_N = 3.85K respectively. A strong coupling of the magnetism to the crystal lattice degrees of freedom in UO2 is found, revealing piezomagnetism as well as the dynamics of antiferromagnetic domain switching between spin arrangements connected by time reversal. The AFM domains become harder to switch as the temperature is reduced, reaching a record value H_PZ(T = 4K) = 18T. The effect of strong magnetic fields is also studied in CeRhIn5, where an anomaly in the sample crystallographic c-axis of magnitude Delta_c/c = 2 ppm is found associated to a recently proposed electronic nematic state at H_en = 30T applied 11o off the c-axis. Here we show that while this anomaly is absent when the magnetic field is applied 18o off the a-axis, strong magnetoelastic quantum oscillations attest to the high quality of the single crystal samples.

arXiv comment5 pages, figures included

References in corpus (10)

• Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8
• A magnetic topological semimetal Sr1-yMn1-zSb2 (y, z< 0.1)
• Magnetostriction and magnetic texture to 97.4 Tesla in frustrated SrCu2(BO3)2
• Electronic in-plane symmetry breaking at field-tuned quantum criticality in CeRhIn5
• High Field Studies of the Hidden Order Transition in URu${}_2$Si${}_2$
• Electronic Structure of CeRhIn${}_5$: dHvA and Energy Band Calculations
• Multiple quantum phase transitions in a heavy fermion antiferromagnet
• Fermi surface reconstruction and multiple quantum phase transitions in the antiferromagnet CeRhIn${}_5$
• Field induced density wave in the heavy fermion compound CeRhIn5
• Enhanced hybridization sets the stage for electronic nematicity in CeRhIn5

Cited by in corpus (1)

• Comments on diffraction experiments at high-field on uranium dioxide in the ordered state